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,

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step-by-step explanation: