3-Dimensional Figures

Presentation

•

Mathematics

•

8th Grade

•

Easy

Ong Jane

Used 3+ times

FREE Resource

5 Slides • 9 Questions

3-Dimensional Figures

By Ong Jane

HOW TO VISUALISE RIGHT-ANGLES IN 3D DIAGRAM?

A plane is a flat, 2D surface that extends infinitely far.

Every face of a 3D diagram is a part of a plane.

A line is perpendicular to a plane when it extends directly away from it.

If a line is perpendicular to a plane, it is also perpendiculat to any line in the plane.

Fill in the Blanks

Which line on the diagram is perpendicular to the shaded plane ABCD ?

Type answer...

Poll

Which line(s) are perpendicular to the shaded face EFGH?

Line GA

Line EF

Line CB

Line GH

Line HD

Multiple Select

The diagram shows a prism. Which line(s) are perpendicular to its uniform cross section?

Draw

In the diagram, ABCDEFGH is a cube of side 5 cm.

Draw a sketch of Triangle ACG . Indicate any known lengths and right angles, if any.

Draw

Draw a sketch of triangle ABC. Indicate any known lengths and right angles, if any.

Draw

Draw a sketch of Triangle AFC. Indicate any known lengths and right angles, if any.

Draw

The diagram shows a triangular prism.

AE = BE = 5 cm, AB = 6 cm, BC = 9 cm and EN perpendicular to AB.

Draw a sketch of ADB. Indicate any known lengths and right-angles, if any.

Draw

The diagram shows a triangular prism.

AE = BE = 5 cm, AB = 6 cm, BC = 9 cm and EN perpendicular to AB.

Draw a sketch of FEN. Indicate any known lengths and right-angles, if any.

Draw

The diagram shows a triangular prism.

AE = BE = 5 cm, AB = 6 cm, BC = 9 cm and EN perpendicular to AB.

Draw a sketch of FNC. Indicate any known lengths and right-angles, if any.

PROBLEM SOLVING INVOLVING 3-D DIAGRAMS

Some text here about the topic of discussion

Steps to solving 3D Trigonometry Problems:

1. Visualise a 3-dimentional figure as a composition of triangles or

plane figures in different planes.

Observe the relationships among various triangles.

3. Find the necessary unknown sides and angles of the triangles

using the skills previously learnt.

3-Dimensional Figures

By Ong Jane

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