Which of the following is Not true about a square?

A.It has 4 right angles
B.It has 4 congruent sides
C.It has 4 acute sides
D.Opposite sides are parallel
C?

The table shows the height of 3 different mountains
Everest=8850
Tacora=5988
Baruntse=7129
Which is the best estimate of the total height of the 3 mountains?
A.22000
B.20000
C.16000
D.14000
A?

a

a

a.20

b.21
c.22
d.23

For the first question, we are asked to identify which statement is NOT true about a square. Let's break down each option and analyze it:

A. It has 4 right angles - This is true. A square has four equal right angles.

B. It has 4 congruent sides - This is true. All sides of a square are equal in length.

C. It has 4 acute sides - This is NOT true. A square has four right angles, which means it cannot have acute angles.

D. Opposite sides are parallel - This is true. The opposite sides of a square are parallel to each other.

Based on our analysis, option C is NOT true about a square because a square does not have acute angles. Therefore, the correct answer is option C.

Now, for the second question, we have a table showing the height of three different mountains: Everest, Tacora, and Baruntse. The heights mentioned are 8850, 5988, and 7129, respectively.

To find the best estimate of the total height of the three mountains, we need to add up their heights. Let's calculate:

8850 (height of Everest) + 5988 (height of Tacora) + 7129 (height of Baruntse) = 21967

The sum of the heights is 21967. This is closest to 22000. So, the best estimate of the total height of the three mountains is 22000.

Therefore, the correct answer is option A.

All right again!