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irakobra [83]
2 years ago
12

Help please im pretty sure this is called angle sum theory but I could be wrong

Mathematics
2 answers:
DENIUS [597]2 years ago
6 0

<u>y = 25</u>

Step-by-step explanation:

<u>=> 115 = y + 90 {exterior angle of triangle is equal to the sum of its opposite two interior angles}</u>

<u>=> 115 = y + 90 </u>

<u>=> 115-90 =y</u>

<u>=> 115 = y + 90</u>

<u>=> 115-90 =</u><u>y</u>

<u>=> y = 25</u>

Alexxandr [17]2 years ago
6 0

Answer:

x= 180°-115°

= 65° ( adjacent angles in a straight line)

y= 180°-90°-65°

= 25° ( angle sum of a triangle)

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