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3 years ago

H E L P P P P P P P PP P P P P P P P P P P P PP. PP. P PP P P P P P P P P P P P P P P P P PP P. PP P P P P P P P. P P

Mathematics

2 answers:

Anni [7]3 years ago

5 0

X=69 for the second one

Oxana [17]3 years ago

3 0

Answer:

x≈7.5

Step-by-step explanation:

Part A:

Let's call the missing side of x:

5²+x²=9²

25+x²=81

x²=56

x= square root of 56

x≈7.5

Part B:

The sum of the internal angles of a triangle is always 180°, and the square in the top angle means that it is 90°, so:

90°+21°+y=180°

y=180°-90°-21°

y=69°

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