Which pair of triangles must be similar? Triangles 1 and 2 each have a 35^{\circ}35
∘
angle.

Triangles 3 and 4 are both isosceles. They each have a 40^{\circ}40
∘
angle.

Triangle 5 has a 30^{\circ}
∘
angle and a 90^{\circ}
∘
angle. Triangle 6 has a 30^{\circ}
∘
angle and a 70^{\circ}
∘
angle.

Triangle 7 has a 50^{\circ}
∘
angle and a 25^{\circ}
∘
angle. Triangle 8 has a 50^{\circ}
∘
angle and a 105^{\circ}
∘
angle.

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.