Select the correct answer. Right triangle DEF has two 45° angles with the hypotenuse, DF, having a length of 8. What is DE?
A.
8v2
B.
4v2
C.
4
D.
8

Charlie tosses five coins.what is the probability that all five coins will land tails up.

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations

What is the slope of the line? a. -5/2 b.2/5 c. 5/2 d.7/2