Let the legs of the triangle be a and b, and the hypotenuse c.
Your first instinct might tell you to use the Pythagorean theorem to go about solving this because

. This works, but it is slow.
The fastest way to solve this is to recognize that the right triangle is a special triangle where the ratio of the sides are 3:4:5. This means that if the legs are 9 and 12, then the hypotenuse is 15 because 3*3 is 9, 3*4 is 12, and 3*5 is 15.
Answer:

Step-by-step explanation:
The formula of a lateral area of a cone:

r - radius
l - slant height
The formula of a surface area of a cone:

We have r= 9mm and l = 17mm. Substitute:


Lines with equal slopes are parallel
Answer:
85,1 ft^2
Step-by-step explanation:
Semicircle area : 4^2π / 2 = 8π = 25,1 ft^2
Triangle area : (8 x 15) / 2 = 60 ft^2
Total Area = 60 + 25,1 = 85,1 ft^2
Answer:
A because it has both the slope and the y-intercept