Review for Quiz 3...interior angles of triangle, acute, etc, ext

A triangle with 3 congruent sides is called a(n) ______

• Isosceles Triangle

• Equilateral Triangle

• Obtuse Triangle

• Irregular Triangle

How many acute angles must an acute triangle have?

• 2
• 1
• 4
• 3

Find the measure of the indicated angle.

Find the measure of the indicated angle.

Find the measure of the missing angles.

• A

• B

• C

• D

Solve for the missing angle with the question mark. 

• A
• B
• C
• D

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 

• 45°
• 90°
• 180°
• 360°

What is the value of the missing angle?

• 90

• 100

• 20

• 120

Look at the sides of this triangle. What type of triangle is this?

• scalene
• acute
• equilateral
• isosceles

What type of triangle is shown?

• Isosceles

• Right-angled

• Equilateral

• Scalene