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| Math Central | Quandaries & Queries |
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Question from lauren, a student: if the sum of the measures are 360 in a parallelogram. a and d are same measures, c and b are same too. If c is twice the measure of a what are all the angles? |
Hi Lauren,
The sum of the measures of the angles is 360 degrees so a + b + c + d = 360. But you know that a = d and b = c so
2a + 2b = 360.
You also know that b = c = 2a so substitute b for 2a in the equation above and solve for b.
Penny
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