For a project, you need to make three triangles out of cardboard. each triangle has a height of 5 inches and a base of 10 inches. which equation can you use to solve for the total amount of cardboard you will need?

Option 1st is correct

Step-by-step explanation:

Area of the triangle is given by:

where,

A is the area of the triangle

b is the base and

h is the height of the triangle.

As per the statement:

For a project, you need to make three triangles out of cardboard.

Each triangle has a height of 5 inches and a base of 10 inches

⇒b = 10 inches and h = 5 inches

Since,  you need to make three triangles out of cardboard

⇒

Therefore, an equation can you use to solve for the total amount of cardboard you will need is,

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.

step-by-step explanation:

this is not possible to solve with the info given.   you need at least an one angle somewhere.