Respuesta :

wegnerkolmp2741o

Answer:

31.5 units^2

Step-by-step explanation:

This is a right triangle

The x dimension is from B to C

-4 to 3 is 7 units

The y dimension is from A to B

5 to -4 = 9 units

The area of a triangle is

A = 1/2 bh

A = 1/2 (7)(9)

   = 31.5

Ver imagen wegnerkolmp2741o
amna04352

Answer:

First one:

31.5 units²

Step-by-step explanation:

AB: 5 - (-4) = 9 units

BC: 3 - (-4) = 7 units

ABC is a right angle triangle with 90° at B

Base: BC

Height: AB

Area:

½ × base × height

½ × 7 × 9

31.5 units²