The perimeter of δ abc is 450 ft. if ab= 9x, bc=41x and ca=40x, what is the area of the triangle?

Step-by-step explanation:

By definition:

The pre-meter P of a triangle ABC is equal to the sum of the length of its sides.

We know that:

The perimeter is:

Now we find the length of the sides:

Once the length of the sides is known, we use Heron's formula to calculate the area.

First I find the semiperimeter S.

Then the Area 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)