The points are (-1,0) (2,7) and (2,0)
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10 Answers

in general you need to find the distance of the points (3 pairs) and apply the formula for area of triangle

in your case, two points lie on x-axis (-1,0) and (2,0) with a distance of 3, so it's much easier that the other point's y-coordinate is the height of the triangle (7) so you can easily apply the formula of 1/2 * base * height
by Level 3 User (2.1k points)
henry :
your way is tooooooo long.
the area is 1/2 * determinant of the 3 points

A = 1/2 *
-1 2 2
0 7 0
A =| 1/2(-7 -14) | = 10.5
Area of a triangle= 1/2 *b*h

Plot the points and count the distances to find the sides. Plug the numbers in and solve.
by Level 2 User (1.1k points)
A jeweler creates triangular medallions by bending pieces of silver wire. Each medallion is an equilateral triangle. Each side of a triangle is 3cm long. How many medallions can b e made from a piece of wire that is 65 cm long?
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you see 2 numbers and you do     base*height

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image find the area

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You  can get your answer by always remembering of a coordinataded shape to help me I use khan academy and I also use ixl.com I hope this helped u guys if need help subscribe things and I will make shure to post them on youtube also a lot of the resources are on youtube for your guyses informationyes

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its very difficult to answer the question
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