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Chapter 1: Q12 (page 20)

State whether the angle appears to be acute, right, obtuse, or straight. Then estimate its measure.

  • 鈭�ADE

Short Answer

Expert verified

The angle 鈭�ADE appears to be straight angle and it鈥檚 estimated measure is (m鈭�5+m鈭�6+m鈭�7).

Step by step solution

01

Step 1. Apply the definition of straight angle.

Straight angle is an angle which measures exactly 180掳.

02

Step 2. Description of step.

From the given figure, it can be observed that the 鈭�ADE measures exactly,180掳 therefore, 鈭�ADE appears to be straight angle.

03

Step 3. Estimate the measure of 鈭燗DE

Clearly, 鈭�ADE=鈭�ADB+鈭�BDC+鈭�CDEwherein 鈭�ADB=m鈭�5, 鈭�BDC=m鈭�6and 鈭�CDE=m鈭�7.

鈭�ADE=m鈭�5+m鈭�6+m鈭�7=180掳

Therefore, the estimated measure of 鈭�ADE=180掳.

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