Question

What type of triangle is STU?



right and congruent
isosceles and acute
congruent and isosceles
scalene and acute

Answer 1

angle S = angle T = x

x+x+50 = 180
2x+50 = 180
2x = 130
x = 65

angle S = angle T = 65 degrees

all three angles are less than 90 degrees, so this is an acute triangle

Answer 2

the two sides ST and TU are congruent based on the tick marks shown, so this is also an isosceles triangle

Answer 3

how'd you figure out it's isoceles?

Answer 4

on segment ST there is a tick mark
same for segment TU

those tick marks tell the reader "these two segments are congruent"

Answer 5

since ST = TU, this means we have an isosceles triangle

Answer 6

isosceles triangle = triangle with exactly 2 congruent sides (the third side is some other length)

Answer 7

got it now thx

Answer 8

you're welcome