Question

Find the value of a.

Answer 1

= 81° + a° + a° = 180° ( angle sum property )

`81° + 3a = 180° \\ 3a = 180 - 81 \\ 3a = 99 \\ a = (99)/(3) \\ a = 33°`

The three angles of this triangle are :

`\: ∠1 \:= 81° \\ \: \: ∠2 = 2a = 2 * 33 = 66° \\ ∠3 = a = 33 \\ \\ ∴ \: a = 33° \:`

Answer 2

mthway

Explanation:

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