1 Answer

Vasyl Sarzhynskyi · Answer 1 · 2023-09-17T03:06:51+0000

The formula for calculating the area of a square or a rectangle is:

$A=L\cdot W$

in which l is the length and w the width.

To calculate the area of a triangle we use the fomula

$A=(b\cdot h)/(2)$

in which b is the base of the triangle and h is the height of the triangle.

The area of a trapezoid is calculated by the formula

$A=((a+b)\cdot h)/(2)$

in which a is the shortest base, b is the longest base and h is the height.

Finally the are of a circle is calculated by the formula

$A=\pi\cdot r^2$

if it is a semi-circle we divide pi by a half, which results as

$A=(\pi)/(2)\cdot r^2$

same happens for a quarter-circle, but we divide it by 4, it results as

$A=(\pi)/(4)\cdot r^2$

for the 3 of them r represents the radius of the circle.

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