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Sidana [21]
2 years ago
15

I need help with these two please and tysm

Mathematics
1 answer:
Serhud [2]2 years ago
5 0
Ok so for the first one:
-We know that the 4 angles add up to 360
-3 of the angles are given
-To find the fourth we simply subtract the sum of the 3 angles from 360.

Equation: 120+ 100+ 100 + x = 360
= 320+x= 360

Now by making x the subject
x= 360 - 320
= 40 degrees

The second one follows the same method

150+ 77+ 48+ x =360
275 +x = 360
x= 360-275
x= 85
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