Question Detail

GET 102 GEOMETRIC CONSTRUCTION: POLYGONS AND TANGENCY Objective Question

Question

When constructing a regular octagon given the distance across corners, which set square angle is used to draw the cross lines through the center to intersect the circle at points like E, F, G, and H?
Options
A 30º
B 45º
Correct Answer
C 60º
D 90º
Correct Answer

Option B is the correct answer.

Detailed Explanation

As per step 3 on Page 6, 'With the 45º set square, draw two cross lines through centre O to intersect the circle at E, F, G & H.' This creates the 8 equal divisions required for an octagon.

Hint

Look at 'REGULAR OCTAGON: Given the Distance Across Corners' on page 6, specifically step 3 and the angle markings on the diagram.

Question Info