HELP ME FAST PLEASE \

A triangle is shown on the coordinate plane below.

What is the area of the triangle?
Question 4 options:

26 square units

28 square units

21 square units

56 square units

The area of the triangle is 28 square units

Step-by-step explanation:

First we have to calculate the length of the base of the triangle and the length of the height

To calculate the base we have to subtract point (-1 , 2) from point (7 , 2)

(7 , 2) - (-1 , 2)  = ((7 - (-1)) , (2 - 2)) = (8 , 0)

because it has no component in y this means that the length of the base is 8

b = 8

To calculate the height we have to subtract point (-1 , 2) from point (-1 , 9)

(-1 , 9) - (-1 , 2) = (((-1) - (-1)) , (9 - 2)) = (0 , 7)

because it has no component in x this means that the length of the base is 7

h = 7

To calculate the area of a triangle we have to multiply the base by the height and then divide it by 2

a = (b * h)/2

a = (8 * 7)/2

a = 56/2

a = 28

The area of the triangle is 28 square units

An Acute angle is an angle whose degree measure is greater than 0 and less than 90o. An Right angle is an angle ... m∠BEC = 5x - 25 and m∠DEA = 7x – 65, find m∠AED, m∠DEB, If all sides of a polygon ABCDE are congruent, the measure of angle A is (4x -10).

Step-by-step explanation: