Answer:
A = 181.12 mm²
Third option
Step-by-step explanation:
To find the area of any triangle, use the formula A = bh/2
"A" is area
"b" is base
"h" is height
In any triangle, the base and height depend on how it's drawn. In this diagram, it is shown that the base is the bottom side of the triangle (b = 28.3 mm) and the height is the perpendicular dropped from the top corner (h = 12.8 mm).
Use the formula to find the area. Substitute the known values first.
A = bh/2
A = (28.3 mm)(12.8 mm)/2 Substitute and multiply
A = (362.24 mm²)/2 Divide
A = 181.12 mm² Area of the triangle
Remember that when you multiply units, the units' exponents are added together.
mm X mm = mm¹ X mm¹ => mm²
Therefore the area of the triangle is 181.12 square millimetres.
