For first is B For second is C::::)
Answer:
m<P = 30°
Step-by-step explanation:
∆PQR has two equal sides. An isosceles ∆ has two equal sides and the angles opposite the two equal sides are congruent to each other.
Thus, we can conclude that ∆PQR is an isosceles ∆ with two equal base angles, <P and <Q.
Since m<Q = 75°, therefore, m<R = 75°.
m<P = 180 - (75 + 75) (sum of ∆)
m<P = 30°
Answer: 2520 cm³
Step-by-step explanation:
1. You must use the following formula for calculate the volume of a triangular pyramid, which is:

Where B is the area of the base and h is the height.
2. Calculate the area of the triangular base:

3. Susbstiute values into the formula for calculate the volume. Then, you obtain the following result:

Answer:
8x-48
Step-by-step explanation: