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rewona [7]
3 years ago
14

Help me understand how to do this

Mathematics
2 answers:
wariber [46]3 years ago
5 0

We know that the two angles are congruent (equal in measure), so we take the written out descriptions of the angles and convert them to equations that we set equal to each other.


"Three more than twice a number" = 2x + 3

"54.5 less than three times the number" = 3x - 54.5


2x + 3 = 3x - 54.5

Add 54.5 to both sides

2x + 57.5 = 3x

Subtract 2x from both sides

57.5 = x


Now we plug in 57.5 in the original equations to get the measure of each angle.

2(57.5) + 3 = 118 degrees

3(57.5) - 54.5 = 118 degrees

As we already knew, the angles are congruent.


P.S.: Nowhere in the prompt does it say anything about a triangle, just that we have a pair of congruent angles. Be sure to read each prompt carefully.

NeTakaya3 years ago
4 0
U need the law of cosines and heron's formula
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