Which angle is complementary to angle ?

angle BAC is complementary to angle ACB

Step-by-step explanation:

Complementary angles add up to 90 degrees.

In a triangle, the sum of angles is 180 degrees.

ABC is a right triangle, so angles a+c=90 degrees.

a)angle ACB

Basic facts:

angles in a triangle add up to 180

complementary angles are angles which add up to 90

Step-by-step explanation:

we can see the triangle is a right-angle triangle

if we subtract angle ABC (90 degrees)we are left with 90 degrees

therefore angle BAC and ACB add up to 90

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.

christopher is 272,195 year old

step-by-step explanation: