Since this is a quadrilateral, all angles together = 360°. The angle that is 128° is congruent to angle y, so y=128°. Angle x and y are supplementary, meaning together they equal 180°, or x+y=180°. So x=180°-y. Which means, x=180°-128°=52°.
The first one is 4
The second one is 2.449489743 or 2.45
Answer:
7 1/20
Step-by-step explanation:
9 2/5 ÷ 1 1/3 = 9 6/15 ÷ 1 5/15
= 141/15 ÷ 20/15
= 141/15 * 15/20
= 141/20
= 7 1/20
We know that π = 180°, therefore:
1.

Answer: correct
2.

Answer: no correct
3.

Answer: no correct
4.

Answer: correct
5.

Answer: correct