Calculate the area of triangle cde with altitude ef, given c (3, −2), d (−1, 2), e (2, 3), and f (0, 1). 4 square units 6.2 square units 8 square units 8.7 square units

8 square units

Step-by-step explanation:

taking angle EFC to be 90 degrees

the area of triangle CDE is given as

Area = 1/2(CD x EF)

distance between two point is

√(x2 - x1)² + (y2 - y1)²

distance CD = √(-1-3)²+(2-(-2))² = √32 units

distance EF = √(2-0)²+(3-1)²=√8units

Area CDE = 1/2(√32 x √8) = 8.00 square units

8 square units.

Step-by-step explanation:

In order to calculate the area of a triangle you need to know what the formula is to find the area. The area formula for a triangle is 1/2bh

Area = 1/2(base)(height)

The Area = 1/2 x

8 = 1/2 x

32

step-by-step explanation:

16.9 times 2.85

step-by-step explanation: