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beks73 [17]
3 years ago
15

In this rectangle, find m angle DEC. Please help me!!!!

Mathematics
1 answer:
notsponge [240]3 years ago
6 0

Answer:

118°

Step-by-step explanation:

EDC is 31° and ECD has the same measure. (Triangle DEC is isosceles)

The total sum of angle EDC and ECD is 31 + 31 = 62°

The total sum of all the angle measures in a triangle is 180°, so just subtract 62 from 180 to get the measure of angle DEC.

180 - 62 = 118°

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Answer:

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Step-by-step explanation:

We assume, that the number 25 is 100% - because it's the output value of the task.

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6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

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