Can someone please help me

  x = 21

Step-by-step explanation:

The angle T is an exterior angle to the ∆RST, so will be equal to the sum of the remote interior angles:

  T = 4x° +2x° = 6x°

T is also a same-side exterior angle with the one marked 54°, so is supplementary to that:

  T + 54° = 180°

  6x° + 54° = 180°

  x + 9 = 30 . . . . . . . . divide by 6

  x = 21 . . . . . . . . . . . . subtract 9

Check

The triangle angles are ...

  4x = 84°

  2x = 42°

  unmarked = 54°

Their sum is 84° +42° +54° = 180° . . . as it should be.

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation:

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)