All categories

2 years ago

Radius of a semi circle

Mathematics

2 answers:

Ivahew [28]2 years ago

8 0

The area for semi circle is: (pi)(r^2)/2

A= 3.142 x (8.2)^2 / 2

A= 110.8 cm^2

bulgar [2K]2 years ago

6 0

A=3.142*r^2
Area of the circle= 3.142*8.2^2
=211.26
Because it’s a semicircle, divide by two.
211.26/2 = 105.6

You might be interested in

1. 800 divided by 4

grigory [225]

I did the work for you. I also showed my work. Hope it helped

4 0

3 years ago

Communicate Mathematical Ideas Find the area of the figure. Explain how you found your answer. 10 ft 16 ft 12 ft 18 ft

sveta [45]

<h3>Answer: 300 square feet</h3>

Explanation:

The trapezoid has area of

A = h*(b1+b2)/2

A = 6*(10+18)/2

A = 84

The rectangle is 18 ft by 12 ft, which leads to an area of 18*12 = 216 sq ft.

Adding the two sub-areas gets us: 84+216 = 300

The total area of the house-shaped figure is 300 sq ft.

5 0

2 years ago

Find the area of the trapezoid.

goldenfox [79]

Answer:

Step-by-step explanation:

AREA=

$\frac{(a + b)}{2} \times h$

$\frac{15 + 6}{2} \times 10$

=105m²

6 0

3 years ago

Zubin has two pieces of string. One piece is 36 inches long and the other is 48 inches long. He wants to cut them into equal pie

skelet666 [1.2K]

Answer:

12 pieces each:

$S_1 = 3\ in$

$S_2= 4\ in$

Step-by-step explanation:

Given

$S_1 = 36\ in$ -- first string

$S_2 = 48\ in$ --- second string

Required

Determine the number of equal pieces

To do this, we first calculate the HCF of the length of both pieces $(36\ and\ 48)$

$36 = 2 * 2 * 3 * 3$

$48 = 2 * 2 * 2 * 2 * 3$

$Common\ prime\ factors = 2, 2\ and\ 3$

The HCF is:

$HCF = 2 * 2 * 3$

$HCF = 12$

<em>Hence, he can cut both strings to 12 pieces each</em>

<em>Recall that </em>

$S_1 = 36\ in$

<em>The first string can then be cut in to 3 inches each (i.e. 36/12)</em>

$S_2 = 48\ in$

<em>The first string can then be cut in to 4 inches each (i.e. 48/12)</em>

7 0

3 years ago

How many acute angles are in an acute triangle?<br> a.3<br> b.2<br> c.1<br> d.0

NeX [460]

Answer: a.) 3

Step-by-step explanation: An acute triangle (or acute-angled triangle) is a triangle with three acute angles (less than 90°).

3 0

2 years ago

Read 2 more answers