Finding Missing Angles in Isosceles Triangles

The video tutorial explains how to apply the angle sum theory and properties of isosceles triangles to solve problems. It begins by identifying two isosceles triangles and focuses on calculating unknown angles using known values and properties of isosceles triangles. The tutorial demonstrates how to use the angle sum property and simple subtraction to find missing angles, emphasizing the relationship between equal sides and equal angles in isosceles triangles.

What type of triangles are identified in the problem?

• Right triangles

• Isosceles triangles

• Scalene triangles

• Equilateral triangles

Tags

CCSS.4.G.A.2

What is the significance of the two equal sides in an isosceles triangle?

• They indicate the triangle has two equal angles.

• They indicate the triangle has a right angle.

• They indicate the triangle is scalene.

• They indicate the triangle is equilateral.

If two angles in an isosceles triangle are 44°, what is the measure of the third angle?

• 92°

• 44°

• 88°

• 72°

Tags

CCSS.8.G.A.5

What is the angle measure of a straight line?

• 180°

• 45°

• 90°

• 360°

Tags

CCSS.HSG.CO.A.1

CCSS.4.MD.C.5B

How do you find the unknown angle in a triangle if you know the other two angles?

• Subtract the smaller angle from the larger angle

• Divide the sum of the two known angles by 2

• Multiply the two known angles

• Add the two known angles and subtract from 180°

Tags

CCSS.8.G.A.5

What is the measure of angle e in the left triangle?

• 92°

• 44°

• 136°

• 22°

Tags

CCSS.8.G.A.5

What is the measure of the angle opposite to the equal sides in the left triangle?

• 136°

• 92°

• 22°

• 44°

Tags

CCSS.8.G.A.5

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

• 270°

• 90°

• 180°

• 360°

Tags

CCSS.8.G.A.5

If one angle in a triangle is 136°, what is the sum of the other two angles?

• 136°

• 180°

• 92°

• 44°

Tags

CCSS.8.G.A.5

What is the measure of each of the two equal angles in the left triangle?

• 44°

• 136°

• 22°

• 92°

Tags

CCSS.8.G.A.5