Answer:
okay so:
your first question answer is: diameter
your second question would be: that a isosceles triangle has two sides that are congruent or equal to each other
your fourth questions answer is 314 cm
However I am very sorry because I can't read your third question
Step-by-step explanation:
the reason the first question is diameter is because the line stretches across the circle till it reaches one side to the other.
Isosceles tringles always have at least two congruent sides
the reason the answer is because you have multiply the radius 10 by the other half of the radius 10 to get 100 then multiply it by pi 3.14 to get the surface area which it 314 cm
