Transum Software

Trigonometry in Three Dimensions

Calculate sides and angles in three dimensional shapes using trigonometry (including Pythagoras' theorem).

Menu Level 1 Level 2 Level 3 Level 4 Level 5 Exam-Style Help More

This is level 4: Worded three-dimensional problems without diagrams. You can earn a trophy if you get at least 4 questions correct and you do this activity online. Give answers correct to three significant figures.

1. Find the angle that the diagonal from a vertex of a cube makes with an edge of the cube at that vertex.

° Correct Wrong

2. The pyramid ABCDE has a square base ABCD with sides of length 45m and AE = AB = AC = AD = 61m. Find the height of the pyramid.

m Correct Wrong

3. A triangular prism has a cross section in the shape of a right-angled triangle with sides of length 54cm, 72cm and 90cm. The length of the prism is 39cm. PQ is the line from the vertex with the smallest angle of one of the triangular faces to the the vertex with the right angle of the other triangular face. RQ is the edge joining the two vertices at the right angles of the triangular faces. Find the angle between PQ and RQ.

° Correct Wrong

4. A large sports hall is built in the shape of a massive cuboid with a height of 54m, width 39m and length 62m. Find the angle of elevation of one of the top corners of the sports hall as seen from the diagonally opposite corner on the floor of the building.

° Correct Wrong

5. The angle of elevation of the top of a building is 25 degrees from a point X which is due north of the building. The angle of elevation of the top of that same building is 46 degrees from a point Y which is due west of the building. Find the height of the building in metres if the point X is one kilometre further from the building than the point Y.

m Correct Wrong
Check

This is Trigonometry in Three Dimensions level 4. You can also try:
Level 1 Level 2 Level 3 Level 5

Instructions

Try your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help.

When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file.

Why am I learning this?

Mathematicians are not the people who find Maths easy; they are the people who enjoy how mystifying, puzzling and hard it is. Are you a mathematician?

Comment recorded on the 24 May 'Starter of the Day' page by Ruth Seward, Hagley Park Sports College:

"Find the starters wonderful; students enjoy them and often want to use the idea generated by the starter in other parts of the lesson. Keep up the good work"

Comment recorded on the 3 October 'Starter of the Day' page by S Mirza, Park High School, Colne:

"Very good starters, help pupils settle very well in maths classroom."

Whose Idea Was This?

Did you enjoy doing this 'Trigonometry in Three Dimensions' activity? Are you curious about who originally came up with this idea in Maths? Discover more about one of the mathematicians who is associated with this concept.

Featured Activity

Shunting Puzzles

Shunting Puzzles

These puzzles are Transum's versions of the shunting or switching puzzles made popular by train enthusiasts and logic puzzle solvers.

Answers

There are answers to this exercise but they are available in this space to teachers, tutors and parents who have logged in to their Transum subscription on this computer.

A Transum subscription unlocks the answers to the online exercises, quizzes and puzzles. It also provides the teacher with access to quality external links on each of the Transum Topic pages and the facility to add to the collection themselves.

Subscribers can manage class lists, lesson plans and assessment data in the Class Admin application and have access to reports of the Transum Trophies earned by class members.

If you would like to enjoy ad-free access to the thousands of Transum resources, receive our monthly newsletter, unlock the printable worksheets and see our Maths Lesson Finishers then sign up for a subscription now:

Subscribe

Go Maths

Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths page is an alphabetical list of free activities designed for students in Secondary/High school.

Maths Map

Are you looking for something specific? An exercise to supplement the topic you are studying at school at the moment perhaps. Navigate using our Maths Map to find exercises, puzzles and Maths lesson starters grouped by topic.

Teachers

If you found this activity useful don't forget to record it in your scheme of work or learning management system. The short URL, ready to be copied and pasted, is as follows:

Alternatively, if you use Google Classroom, all you have to do is click on the green icon below in order to add this activity to one of your classes.

It may be worth remembering that if Transum.org should go offline for whatever reason, there is a mirror site at Transum.info that contains most of the resources that are available here on Transum.org.

When planning to use technology in your lesson always have a plan B!

Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments.

Transum.org is a proud supporter of the kidSAFE Seal Program

© Transum Mathematics 1997-2024
Scan the QR code below to visit the online version of this activity.

This is a QR Code

https://www.Transum.org/go/?Num=895

Description of Levels

Close

Close

Pythagoras' Theorem - Start by applying Pythagoras' theorem in two dimensions.

2D Trigonometry - Revise using trigonometry in two dimensions.

Level 1 - Three dimensional problems which can be solved using Pythagoras' theorem

Level 2 - More three dimensional problems requiring the use of trigonometrical ratios

Level 3 - Mixed three dimensional problems

Level 4 - Worded three-dimensional problems without diagrams

Level 5 - Problems involving planes (not the flying type!)

Exam-Style Questions - A collection of problems in the style of GCSE or IB/A-level exam paper questions (worked solutions are available for Transum subscribers).

More on this topic including lesson Starters, visual aids, investigations and self-marking exercises.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

Log in Sign up

Example

You may also want to use a calculator to check your working. See Calculator Workout skill 11.

Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can double-click the 'Check' button to make it float at the bottom of your screen.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

Log in Sign up

Close

Close