Which statements about a square are always true?

- Two angles are obtuse.

No.  There are no obtuse angles in a square.

- All sides are equal.

No.  It's true of squares AND rhombuses.

- Two or more angles are right angles.

Yes.  Always true for a square, sometimes true for a rhombus.

- More than two sides are parallel.

Confusing, so call it a 'no'.

In both squares and rhombuses, every one of the four sides

is parallel to ONE other side.

Another important note:

Look at the statement that's true always for a square and sometimes for a rhombus:

"Two or more angles are right angles".

WHEN does a rhombus have right angles in it ?  Fasten your seat belt and hold on tight:

A square is a special kind of rhombus.  It's a rhombus that has right angles in it.

So a rhombus has right angles in it when it's a square.

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation:

b

step-by-step explanation: