Answer:
A = 8π cm²
Step-by-step explanation:
The area (A) of a circle is calculated as
A = πr² ( r is the radius )
Here diameter = 8 , then r = 8 ÷ 2 = 4
The area of half a circle is then
A = 
π × 4² = × π × 16 = 8π cm²
Answer:
360
Step-by-step explanation:
The sum of the interior angles of a quadrilateral is 360 degrees
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Answer:
a) 16
b) 36
c) 4
d) 81
Explanation:
Finding the square root of a number is the inverse operation of squaring that number. Remember, the square of a number is that number times itself. The perfect squares are the squares of the whole numbers. The square root of a number, n, written below is the number that gives n when multiplied by itself.
I did the math on a word document; hopefully, the steps help. Remember to use a graphic calculator to solve it.
