Understanding Triangles

What type of angle is not present in the triangle shown in the video?

• Straight

• Acute

• Right

• Obtuse

What is the relationship between the 80° angle and the unknown angle in the triangle?

• Equal

• None

• Complementary

• Supplementary

Why is it impossible to draw a triangle with two obtuse angles?

• Because obtuse angles are more than 180°

• Because obtuse angles are equal to 90°

• Because the sum of angles in a triangle is 180°

• Because obtuse angles are less than 90°

Which type of triangle has all angles less than 90°?

• Right

• Acute

• Scalene

• Obtuse

What is a triangle with no congruent sides called?

• Scalene

• Right

• Equilateral

• Isosceles

How would you classify a triangle with one right angle and two congruent sides?

• Acute Scalene

• Right Scalene

• Right Isosceles

• Obtuse Isosceles

What type of triangle is formed by a skateboarding ramp with a right angle and no equal sides?

• Right Scalene

• Right Isosceles

• Obtuse Scalene

• Acute Isosceles

If angle A is 25° and angle B is 108°, what is the measure of angle C in triangle ABC?

• 77°

• 67°

• 57°

• 47°

What is the sum of the angles in any triangle?

• 270°

• 180°

• 360°

• 90°

In the example with the Alabama state flag, what is the missing angle if the other two angles are 110° and 35°?

• 35°

• 45°

• 65°

• 55°