The rectangle and the rhombus
Answers are for parents and teachers.
1
The perimeter of a rectangle is 70 cm and one side is 15 cm. How long is the other side (cm)?
20
2
In rhombus ABCD, ∠ABC = 110°. How many degrees is ∠ABD cut off by the diagonal BD?
55
3
The acute angle of a rhombus is 60° and its side is 12 cm. How long is the shorter diagonal (cm)?
12
4
The diagonals of rectangle ABCD meet at O and ∠AOB = 70°. How many degrees is ∠OAB?
55
5
Write in a sentence or two how a rectangle differs from a rhombus.
In a rectangle all angles are right and the diagonals are equal; in a rhombus all sides are equal and the diagonals are perpendicular.