A semi circle has a radius 8.2 cm
Work out the area of this semi circle
Take pi to be 3.142 and give your answer to 1 decimal place

Do you have answer choices?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.