Can anyone help me with my sister's hw plz will give brainliest if answered all 5

1) triangular garden is larger

2) 1.46 square feet

3) 56.5 square inches

4) 557.1 sq in

5) 216 sq in

Step-by-step explanation:

1) Area of circlular garden: 78.54

Area of triangle garden: 80

2) 80 - 78.54 = 1.46

3) 12/2 = 6

= 113.1

113.1/2 = 56.5

4) area of square: 20(20) = 400

area do semicircle: /2 = 157.1

400 + 157.1 = 557.1

5) square: 144

triangle: 144/2 = 72

144 + 72 = 216

throw the computer

step-by-step explanation:

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240