Name the angle pair Adjacent Angles
Linear Pair
Vertical Angles
Complementary Angles

Complementary angles always add to 90 degrees

You can think of the "co" in complementary referring to "corner", since both words start with "co".

In contrast, supplementary lines form a straight angle (ie the angles add to 180). "Supplementary" and "straight" both start with S to help remember the term.

The angles shown are adjacent, but the term complementary is a better description I think. The angles are not vertical angles.

Since b+64 = 90, this equation solves to b = 26 after subtracting 64 from both sides.

a. the are of the rectangle is 18.25

b. 18.25 times two is 36.50

rae me : d

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.