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fenix001 [56]
2 years ago
7

Find the area of a triangle with vertices at D(2, 0), E(–1, 0), and F(2, –7).

Mathematics
1 answer:
MAVERICK [17]2 years ago
3 0

Answer:

\frac{21}{2} units²

Step-by-step explanation:

D and E lie on the x- axis and F is vertically below D

The triangle formed is right at D with legs of length 3 and 7

The area (A) of a right triangle is found using the formula

A = \frac{1}{2} bh ( b is the base and h the perpendicular height )

here b = 3 and h = 7, hence

A = \frac{1}{2} × 3 × 7 = \frac{21}{2} units ²

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