7GM Geometry Quiz

An isosceles triangle has

• Equal sides

• 2 equal sides

• 4 equal sides

• All equal sides

Answer explanation

All isosceles have two equal sides

A revolution angle is

Answer explanation

Revolution angles is one full rotation

A reflex angle measures

Answer explanation

Reflex angles are more than a straight line but less than a full rotation.

Answer explanation

x + 40 = 90

x = 50

Complementary
(make a corner i.e., 90)

Answer explanation

60 + 90 + x = 180

150 + x = 180

x = 30

Supplementary
(make a straight line i.e., 180)

Answer explanation

Size way Z so alternate.

Angles equal each other if they're alternate.

Answer explanation

Make an upside down F so it's corresponding.

Corresponding angles equal the same.

Answer explanation

Make a backwards C so it's co-interior.

Co-interior angles add up to 180

The angle sum of a triangle is

Answer explanation

The three angles in a triangle ALWAYS add up to 180

Answer explanation

a + 20 + 115 = 180

a + 135 = 180

a = 45