Question

what is the half area of the triangle whole vertices are (1, 1) (3, 1) (1, 3)​

Answer 1

Answer:

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Step-by-step explanation:

Given:

A(1,1) B(3,1) c (1,3)

To Find:

half of area of triangle

Proof:

area of triangle = 1/2 | x1(y2 - y3) + x2 ( y3-y1) + x3 ( y2-y1)^2

area = 1/2 | 1(1-3) + 3(3-1) + 1(1-1)|

= 1/2 | -2+6|

= 2 square units

half of area of rectangle = 1/2 [2] = 1 sq units