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jevanoff
19.04.2020 •
Mathematics
Maximum points and Brainliest. Qu. Work out the isosceles triangle angle AED and show workings.
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Ответ:
40 degrees.
Step-by-step explanation:
m < ADC = 110 degrees (The opposite angles of a parallelogram are equal).
m < ADE = 180 - 110 = 70 degrees ( adjacent angles are supplementary).
Now triangle ADE is isosceles so the base angles are equal, therefore:
m < AED = 180 - 2(70) = 40 degrees.
Ответ:
40 degrees
Step-by-step explanation:
Opposite angles in a parallelogram are congruent.
We know that <B is 110 degrees, and it’s opposite angle is <ADC. So <ADC must also be 110 degrees.
<ADC and <ADE are on a straight line, and they are supplementary, or add to 180 degrees
<ADC + <ADE =180
110 + <ADE =180
Subtract 110 from both sides
<ADE=70
We know the triangle is isosceles, so <DAE must also be 70 degrees
The angles in a triangle must add to 180 degrees.
<DAE + <ADE + <AED = 180
70 + 70 + <AED =180
140 + < AED =180
Subtract 140 from both sides
<AED=40
Ответ:
16.25
Step-by-step explanation:
13/4 = 3.25
5×3.25=16.25