Can someone me with these, will give you brainliest and lots of points.

An isosceles triangle has a pair of equal sides and angles, and the third side/angle different from the other two. So, the first triangle (20-20-10) is isosceles because it has to sides with the same measure (20) and the third which is different (10)

A scalene triangle has three different angles and three different sides. So, the second triangle is scalene, because the lengths of its sides are all different.

Finally, an equilateral triangle has all three sides and angles of the same measure, so the third triangle is equilateral, because all his sides are 5 units long.

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.