Question

Find the value of a.

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Answer 1

Answer:

refer to the attachment above ...

Answer 2

Answer:

a=35°.

Step-by-step explanation:

(3a+20)°+(2a-5)°+(a-5)°+4a=360°,as sum of all angles is 360°.

so, 3a+20+2a-5+a-5+4a=360.

or, 10a+10=360.

or, 10a=360-10=350.

or, a=350/10.

or, a=35°.

HOPE IT HELPS..............