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Find the perimeter and area of the given triangle. Round to the nearest tenth. A (‐1, 3 ), B( 8, 3), C( ‐1, 5)
(MUST SHOW WORK)

Respuesta :

mhanifa

Answer:

  • 9 unit²

Step-by-step explanation:

Plot the given points:

  • A (‐1, 3 ), B( 8, 3), C( ‐1, 5)

We see ABC is a right triangle.

Find the length of AB and AC:

  • AB = 8 - (-1) = 9
  • AC = 5 - 3 = 2

Find the area:

  • A = (1/2)bh
  • A = (1/2)*2*9 = 9
Ver imagen mhanifa

AB:-

  • √(8+1)²+(3-3)²
  • √9²
  • 9

BC

  • √(8+1)²+(3-5)²
  • √9²+2²
  • √81+4
  • √85
  • 9.2

AC

  • √(-1+1)²+(3-5)²
  • √2²
  • 2

Perimeter

  • 9+9.2+2
  • 20.2units

Area

  • 1/2(2)(9)
  • 9units²
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