Solving Missing Angles in Triangles and Quadrilaterals

The video tutorial covers finding missing angle measures in triangles and quadrilaterals. It begins with an introduction to the concept that the sum of angles in a triangle is 180 degrees, followed by examples demonstrating how to calculate a missing angle by subtracting the sum of known angles from 180. The tutorial then transitions to quadrilaterals, explaining that their angles sum to 360 degrees, and provides examples of calculating missing angles using similar subtraction methods. The video emphasizes understanding the process and encourages note-taking for future reference.

If a triangle has angles of 26 degrees and 83 degrees, what is the measure of the third angle?

• 74 degrees

• 73 degrees

• 72 degrees

• 71 degrees

Tags

CCSS.8.G.A.5

What is the sum of the angles in any triangle?

• 90 degrees

• 180 degrees

• 270 degrees

• 360 degrees

Tags

CCSS.8.G.A.5

In a triangle with angles of 43 degrees and 79 degrees, what is the measure of the missing angle?

• 61 degrees

• 60 degrees

• 59 degrees

• 58 degrees

Tags

CCSS.8.G.A.5

What is the first step in finding a missing angle in a triangle?

• Subtract the given angles from 360

• Add the given angles together

• Divide the given angles by 2

• Multiply the given angles

Tags

CCSS.8.G.A.5

If a triangle has angles of 87 degrees and 39 degrees, what is the measure of the third angle?

• 56 degrees

• 57 degrees

• 55 degrees

• 54 degrees

Tags

CCSS.8.G.A.5

What is the sum of the angles in any quadrilateral?

• 180 degrees

• 270 degrees

• 360 degrees

• 450 degrees

In a quadrilateral with angles of 89 degrees, 75 degrees, and 79 degrees, what is the measure of the missing angle?

• 120 degrees

• 119 degrees

• 118 degrees

• 117 degrees

Tags

CCSS.HSG.C.A.3

What is the first step in finding a missing angle in a quadrilateral?

• Multiply the given angles

• Subtract the given angles from 180

• Add the given angles together

• Divide the given angles by 2

Tags

CCSS.HSG.C.A.3

If a quadrilateral has two right angles (90 degrees each) and another angle of 65 degrees, what is the measure of the fourth angle?

• 118 degrees

• 117 degrees

• 116 degrees

• 115 degrees

What is the sum of two right angles?

• 360 degrees

• 180 degrees

• 90 degrees

• 270 degrees

Tags

CCSS.7.G.B.5