The middle one is correct because, if you look at the question, you need to find the 1 with more than 1/3. so just think of them as fractions. It will make it easier.
Step-by-step explanation:
A rectangle divided into six equal parts. One of the parts is shaded. = 1/6
A rectangle divided into four equal parts. One of the parts is shaded. = 1/4
A rectangle divided into two equal parts. One of the parts is shaded. = 1/2
A rectangle divided into three equal parts. One of the parts is shaded. = 1/3
Let x=height. then base is x+4. plug what we know into the formula for the area of a triangle
A=½bh
16=½*(x+4)*(x)
32=x²+4x
x²+4x-32=0 (x+8)(x-4)=0 so x can be-8 our 4. when we plug-8 in for x we get a negative height. since a triangle cannot have a negative side length we discard-8 and try 4. height=4 and base=8
