Which category of two-dimensional shapes applies to all three of these shapes?

a.
equilateral

b.
acute

c.
obtuse

d.
isosceles

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.

What is the distance between the points (2, 5) and (5,9)?

Can someone me with my math problem pls my teacher is on my back about this