Answer:
3 x 21
20 x 4 tenths
21 x thirteenth
please mark me as brainlist please
<span>wavelength = 13 mm
frequency = 14 hertz.
Speed = 13*14 = 182 mm/s
</span>
Answer:
44%
Step-by-step explanation:
1% of 54 is 0.54
78/0.54=144.444444
-100% b/c that's the base
44% better
Answer:
The parallelogram is a "Square" ⇒ (a)
Step-by-step explanation:
In a parallelogram
- Every two opposite sides are parallel
- Every two opposite sides are equal
- Every two opposite angles are equal
- Its diagonals bisect each other
- If the diagonals of a parallelogram are equal, then it is a rectangle
- If the diagonals of a parallelogram are perpendicular to each other, then it is a rhombus
- If the diagonals of a parallelogram are equal and perpendicular, then it is a square
∵ In a parallelogram, its diagonals bisect each other at right angles
∴ Its diagonals are perpendicular
∵ Its diagonals are equal
→ By using rule 3 above
∴ The parallelogram is a square
