Question

In the figure, find the value of BC.

Answer 1

Answer:

➡️ BC = 130 m

Step-by-step explanation:

BC = BE + EC.

Now,

✔️Finding BE :

In triangle abe rt angled at b.

✔️BE/ AE = cos 60° (cos Angle = base

/Hypotenuse)

✔️BE /100 = 1/2 (cos 60 is 1/2)

✔️BE = 100/2

✔️BE = 50

➡️ Finding EC :

✔️In triangle ecd rt angled at c :

✔️EC/CD = cot 45 (cot angle = base/ perpendicular)

✔️EC / 80 = 1 (cot 45 is 1)

✔️EC = 80

➡️ BC = BE + EC

➡️ BC = 50 + 80

➡️ BC = 130 m.

Answer 2

Hope you get the help buddy.