The length of a side of an equilateral triangle is 10 inches. what is the length of an altitude of the triangle?

The altitude of an equilateral triangle with side length is .

So, the length of the altitude is

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)