Exploring Angle Decomposition Techniques

The video tutorial explains how to measure angle EAC using a diagram. It guides viewers through identifying angle EAC by following the order of letters E, A, and C. Without a protractor, the tutorial demonstrates how to calculate the angle by combining two smaller angles, EAD and DAC, which sum up to 135 degrees. The process involves understanding the components of the larger angle and performing basic arithmetic to find the total measure.

What is the first step in measuring angle EAC according to the video?

• Add the angles EAD and DAC

• Identify the letters E, A, and C on the diagram

• Measure the length of side EA

• Use a protractor

Tags

CCSS.4.MD.C.6

What tool is commonly used to measure angles?

• Calculator

• Compass

• Ruler

• Protractor

Tags

CCSS.4.MD.C.6

Which angles combine to form angle EAC?

• EAD and DAC

• DAC and EDC

• EAD and EDC

• EAC and DAE

Tags

CCSS.4.MD.C.7

What is the degree of angle EAD?

• 90 degrees

• 75 degrees

• 60 degrees

• 45 degrees

Tags

CCSS.4.G.A.1

What is the degree of angle DAC?

• 60 degrees

• 75 degrees

• 45 degrees

• 90 degrees

Tags

CCSS.4.G.A.1

How do you calculate the measure of angle EAC?

• Subtract the degrees of angle EAD from DAC

• Add the degrees of angle EAD and DAC

• Multiply the degrees of angle EAD and DAC

• Divide the degrees of angle EAD by DAC

Tags

CCSS.4.MD.C.7

What is the total degree measure of angle EAC?

• 135 degrees

• 150 degrees

• 120 degrees

• 145 degrees

Tags

CCSS.7.G.B.5

If angle EAD is 60 degrees, what would be the measure of angle DAC to make angle EAC 150 degrees?

• 90 degrees

• 75 degrees

• 85 degrees

• 95 degrees

Tags

CCSS.4.MD.C.7

What would be the measure of angle EAC if angle EAD was 70 degrees and DAC was 80 degrees?

• 160 degrees

• 140 degrees

• 130 degrees

• 150 degrees

Tags

CCSS.4.MD.C.7

Which statement is true about measuring angles?

• A protractor is not necessary if the diagram provides enough information.

• Angles can only be measured with a protractor.

• Angles are typically measured in radians in school.

• You need a calculator to measure any angle.

Tags

CCSS.4.MD.C.6