Answer:
A semicircle measures 180°
Half of 180º is 90º
A right angle measures 90º.
Step-by-step explanation:
You would just do 4 x 7, which means there are 28 combinations.
Answer:
Step-by-step explanation:
7 choose 2 or
=7! / (7-2)!
=7*6*5*4*3*2*1 / 5*4*3*2*1
=7*6
=42

I hope this this is what you need ..
Step-by-step explanation:
<u>Step 1: Find the answer</u>



Answer: 