The radius of a circle is 15 m. Find its area in terms of
π.

A = 225 or A = 706.858

Step-by-step explanation:

The formula to find the area of a circle is A=, with r being the radius.

In this case, 15 is your radius, so you just replace r with 15, like so:

A=, then simplify

A =

From here you can leave the answer in its exact form, , or you can simplify it by multiplying 225 times pi. In that case, your answer would be: 706.858 (rounded to the thousanths place).

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.