Answer:
JM is the diameter or 180°
MK = diameter - 21° = 159°
Step-by-step explanation:
LAW 2: The second law of indices tells us that when dividing a number with an exponent by the same number with an exponent, we have to subtract the powers. In algebraic form, this rule is as follows . The a represents the number that is divided by itself and m and n represent the powers.
Answer:

Step-by-step explanation:
We have a 4-sided triangular pyramid
, where

Use the Pythagoras theorem:-
height = sqrt(5^2 - 3^2 ) = sqrt16 = 4 metres Answer.