Answer:
Ans 1. 
Ans 2.a.

Ans.2.b.

Step-by-step explanation:
Solution:
1.
Vertically opposite angles are equal.

2.a.
proof for Δ BAC ≅ ΔKJL by SAS postulate.
InΔ BAC and Δ KJL
BA ≅ KJ Given
∠ BAC ≅ ∠ KJL {measure each angle is 90}

2.b.
proof for Δ BAC ≅ ΔKJL by HL theorem.
InΔ BAC and Δ KJL
BA ≅ KJ Given
∠ BAC ≅ ∠ KJL {measure each angle is 90}

The surface area will be 210 square meters. Hope it help!
Answer:
-8π or -25.13
Step-by-step explanation:
Answer:
9/4
Step-by-step explanation:
1.
2.
3. 
Therefore, the slope is 9/4.