Question

Find the supplement of a right angle.
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Answer 1

Step-by-step explanation:

The supplement of the right angle is also a right angle as: If one angle is 90 degrees, the other angle will definitely become 90 degrees as their sum is 180 degrees

Answer 2

Answer:

251.42

Step-by-step explanation:

$height \: = \: 20cm \\ external \: diameter \: = \: 14 \: cm \\ thickness \: = \: 2 \: cm \\ external \: radius \: r1 \: = \: 14 \div 2 \: = 7cm \\ internal \: radius \: r2 \: = \: 14 \div 2 - 2 \: = \: 5cm \\ tsa \: of \: hollow \: cylinder \: = \: 2\pi(r1 - r2) \times h \\ 2 \times 22 \div 7 \times (7 - 5) \times 20 \\ 2 \times 22 \div 7 \times 2 \times 2 = 251.42$