All categories

2 years ago

The area of a circle is 88.44 cm² find the length of the radius rounded to 2 DP

Mathematics

1 answer:

schepotkina [342]2 years ago

4 0

The radius of the circle is 5.30 cm.

<h3>What is a radius?</h3>

A radius is a line that extends from the center of a circle to any point of the circumference.

To calculate the length of the radius of the circle, we use the formula below.

Formula:

A = πr²......... Equation 1

Make r the subject of the equation

r = √(A/π).................. Equation 2

Where:

A = Area of the circle
r = Radius of the circle
π = Pie

From the question,

Given:

A = 88.44 cm²
π = 22/7

Substitute these values into equation 2

r = √(88.44/(22/7))
r = √(88.44×7/22)
r = √(28.14)
r = 5.30 cm

Hence, the radius of the circle is 5.30 cm.

Learn more about radius here: brainly.com/question/24375372

#SPJ1

You might be interested in

Please help!!! Due in 30 mins!!!

stiv31 [10]

It’s A. $25.20
You find the rate you dividing the cost ($18) by how many gallons (5). Then you multiply by what you are looking for (7 gallons). You get 25.20.

7 0

3 years ago

Read 2 more answers

The quotient of a number x and 7 is greater than 5<br> write as an inequality

mariarad [96]

Answer:

x+7>5 there it is pay more attention in class cause that's cake

6 0

3 years ago

0.21x = 252.08 what is x?<br>

Elan Coil [88]

Answer:

(x=1200.380952)?????

7 0

3 years ago

An isosceles triangle has an angle that measures 38degrees. What measures are possible for the other two angles? Choose all that

Sphinxa [80]

Answer:

71° and 71°.

⠀

Step-by-step explanation:

The triangle having two sides equal along with one different side is called an isosceles triangle.

⠀

So, Let us assume the other sides (two equal sides) of the isosceles triangle as x. As the different side is already given in the question.

⠀

We know that,

The sum of all angles of a triangle is 180°

⠀

So, According to the question :

⠀

${\longrightarrow \it\qquad { \ { { 38 \: }^{ \circ} + x + x = 180{}^{ \circ} }}}$

⠀

${\longrightarrow \it\qquad { \ { { 38 \: }^{ \circ} + 2x = 180{}^{ \circ} }}}$

⠀

${\longrightarrow \it\qquad { \ { 2x = 180{}^{ \circ} - { 38 \: }^{ \circ}}}}$

⠀

${\longrightarrow \it\qquad { \ { 2x = 142{}^{ \circ} }}}$

⠀

${\longrightarrow \it\qquad { \ { x = \dfrac{142{}^{ \circ}}{2} }}}$

⠀

${\longrightarrow \it\qquad { \pmb { x = 71^{ \circ} }}}$

⠀

Therefore,

The measure of the two other angles of the isosceles triangle are 71° and 71°.

3 0

2 years ago

Find the area of the rectangle.

kirill115 [55]

Answer:

40 units²

Step-by-step explanation:

Area of Rectangle: A = lw

Step 1: Define variables

<em>l</em> = 8

<em>w</em> = 5

Step 2: Substitute and evaluate

A = 8(5)

A = 40 u²

4 0

4 years ago