Question

please answer the questions in 20 minutes. wrong answer will be reported. Answer all the questions​

Answer 1

Explanation:

1 ang. ACD will be 110 degree

ang. ABC is 50 degree

2 By using exterior angle property

let interior opp angles be x and x

therefore, 120= x+ x

120 = 2x

x= 60

So both would be 60 & 60

3 Let ΔABC be an isosceles triangle with vertical angle ∠A=100

∘

and AB=AC.

Then,

AB=AC⇒∠B=∠C

But, ∠A+∠B+∠C=180

∘

∴100

∘

+2∠B=180

∘

⇒∠B=40

Answer 2

Answer:

It reduces soil erosion and flood hazards by collecting rainwater and reducing the flow of stormwater to prevent urban flooding. Most buildings that utilize rainwater harvesting systems have a built-in catchment area on top of the roof, which has a capacity of collecting large volumes of water in case of rainstorms.