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3 years ago

PLEASE HELP I DONT KNOW

Mathematics

2 answers:

azamat3 years ago

5 0

Answer:

48.56 cm

Step-by-step explanation:

The rectangle: 10+10+8+8

= 36cm

The half circle: 1/2 πd

=1/2x3.14X8

= 12.56

So, the total perimeter will be- 36+12.56

=48.56

Mark me brainliest plss :)) I worked hard for the ans

maks197457 [2]3 years ago

5 0

Answer:

40.565cm

Step-by-step explanation:

To find a circumference (perimeter) of a cirlce, you need to use the formula C=2πr.

We know the diameter is 8 but we need the radius, the radius we would divide the diameter in half.

8 ÷ 2 = 4

Now that we know the radius is 4, you plug in 4 for r, and then solve

C= 2π4

C= 25.13

The circumference of the whole circle is 25.13 so we would cut it in half to get the half of the circle we need. So 25.13 ÷ 2 = 12.565.

Now that we have the circumference of the half-circle, it a lot easier. Take the 3 other sides and the half-circle and just add the together

8 + 10 + 10 + 12.565 = 40.565

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