Geometry Quiz 4.1-4.2

Obtuse Triangle

1 obtuse angle

Right Triangle

1 right angle

Acute Triangle

3 acute angles

Equiangular Triangle

3 congruent angles

Equilateral Triangle

3 congruent sides

Triangle

A polygon with 3 sides

Isosceles triangle

At least two congruent sides

Scalene Triangle

No congruent sides

Corollary to the Triangle Sum Theorem

The acute angles of a right triangle are complementary

Theorem 4.2 Exterior Angle Theorem

The measure of an exterior angle of a triangle is equal to the sum of the measures of the two nonadjacent interior angles

Theorem 4.1 Triangle Sum Theorem

The sum of the measures of the interior angles of a triangle is 180