2 years ago

If m ABC = 125°, and mZABD = 949, then m2DBC = [? ]°

Mathematics

1 answer:

inessss [21]2 years ago

5 0

The answer will be 31 degrees

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A circle with radius of \greenD{3\,\text{cm}}3cmstart color #1fab54, 3, start text, c, m, end text, end color #1fab54 sits insid

Zolol [24]

Answer:

The area of the shaded region is 125.664 square centimetre

Step-by-step explanation:

Area of the shaded region = area of the circle with radius 7 cm - area of the circle with radius 3 cm----------------(1)

Step 1: Finding the area of the circle with radius 7 cm

Area of the circle A = $\pi r^2$

On substituting the value of the radius, we get

Area of the circle A = $\pi(7)^2$

Area of the circle A = $49 \pi$ square centimetre----------------(2)

Step 2: Finding the area of the circle with radius 3 cm

Area of the circle a = $\pi r^2$

On substituting the value of the radius, we get

Area of the circle a = $\pi (3)^2$

Area of the circle a = $9 \pi$ square centimetre ----------------(3)

Step 3: Finding the area of the shaded region

Area of the shaded region = $49 \pi - 9\pi$

= $40 \pi$

= 125.664 square centimetre

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3 years ago