Find perimeter of the semicircular region​

Formula to find the perimeter of a semicircular region:

if radius given: +    {r = radius}

if diameter given: {d = diameter}

Take as 3.14

Q4.

Diameter = 28 yd

Radius = 28/2 = 14 yd

yd

Q5.

Radius = 7.5 ft

Diameter = 7.5 × 2 = 15 ft

ft

Q6.

Diameter = 11 cm

Radius = 11/2 = 5.5 cm

cm

I hope this helps...

Have a great day ahead :)

Ivan get 90 pounds more than Tanya.

Step-by-step explanation:

Since it's a 4:1 ratio there is 5 parts in total. So i divided the 150 by 5 to get 30. From there i multiplies the 30 by 4 to get Ivan's portion and Tanya only has one portion which is 30. So Ivan has 120 and Tanya has 30, 120-30= 90