Exploring Interior Angles of Triangles

The video tutorial covers the concept of interior angles, focusing on triangles. It explains that the sum of interior angles in a triangle is always 180 degrees. The tutorial provides examples of calculating missing angles in triangles, including scenarios with right angles. The lesson concludes with a review of the key points discussed.

What is an interior angle?

• An angle on the edge of a shape

• An angle inside a shape

• An angle formed by two shapes

• An angle outside a shape

Which of the following is a polygon with five sides?

• Triangle

• Hexagon

• Quadrilateral

• Pentagon

What is the sum of the interior angles of a quadrilateral?

• 180 degrees

• 450 degrees

• 270 degrees

• 360 degrees

What is the sum of the interior angles of a triangle?

• 180 degrees

• 90 degrees

• 270 degrees

• 360 degrees

If the sum of two angles in a triangle is 120 degrees, what is the measure of the third angle?

• 60 degrees

• 30 degrees

• 40 degrees

• 50 degrees

If angle B is 64 degrees and angle C is 70 degrees in triangle ABC, what is the measure of angle A?

• 60 degrees

• 46 degrees

• 70 degrees

• 50 degrees

In triangle DEF, if angle D is 107 degrees and angle E is 42 degrees, what is the measure of angle F?

• 45 degrees

• 40 degrees

• 35 degrees

• 31 degrees

If angle D is 107 degrees and angle E is 42 degrees, what is the sum of these two angles?

• 139 degrees

• 149 degrees

• 159 degrees

• 169 degrees

In triangle PQR, if angle P is 45 degrees and angle R is 90 degrees, what is the measure of angle Q?

• 30 degrees

• 40 degrees

• 35 degrees

• 45 degrees

What is the measure of a right angle?

• 90 degrees

• 60 degrees

• 45 degrees

• 120 degrees