To draw perpendicular lines

Maths

A triangle contains how many angles inside?

Angles which are smaller than right angles are called...?

A square contains 4 right angles, true or false?

This image shows perpendicular lines, true or false?

When a horizontal and vertical line meet at a right angle, it is called...?

lines that do (or would) meet at a right angle

Squares (like the one below) contain 4 pairs of perpendicular lines. True or false?

True or false, the two arrowed lines below are showing perpendicular lines.

How many pairs of perpendicular lines can you find in the shape below?