3 Here is a prism ABCDSPQR.
P
D
Q
14 cm
The base ABCD of the prism is a square of side 14 cm
T is the point on BC such that BT: TC = 4:3
B
T
R
Find the size of the angle between the line ST and the base ABCD.
Give your answer correct to 1 decimal place.
12 cm
C
The cross section of the prism is in the shape of a trapezium of area 147 cm²
CR = 12cm
