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Elza [17]
3 years ago
6

Calculate the sizes of the unknown angles in each diagram. Please, answer with explanation.

Mathematics
1 answer:
denis23 [38]3 years ago
5 0

Step-by-step explanation:

a) 2z+3z+4z=180

9z=180

z=20

So,three angles are 40,60 and 80

b) (y+30)+(2y+80)+(y+10)=180

y+30+2y+80+y+10=180

4y+120=180

4y=60

y=15

Three angles are 45,110,25

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