The diagonals of the rhombus are 6 cm and 8 cm. Determine the height of the diamond.
1) Find the area of the rhombus.
We know the lengths of the diagonals of the rhombus. We can find the area of the rhombus. Let’s write the formula for the area:
S = 1/2 × d1 × d2,
where d1 and d2 are rhombus diagonals.
Substituting the values of the diagonals in the formula, we find the area:
S = 1/2 × 6 × 8 = 24 cm².
2) Find the side of the rhombus.
Based on the properties of the rhombus, knowing the diagonals, we can find its side. Let’s write down:
The sum of the squares of the diagonals is equal to the square of the side times 4:
d1² + d2² = 4a²,
where d1 and d2 are the diagonals of the rhombus, and is the side of the rhombus.
Substituting the values of the diagonals in the formula, we find the side of the rhombus:
6² + 8² = 4 × a²,
4 × a² = 36 + 64,
4 × a² = 100,
a² = √ (100: 4),
a² = √25,
a = 5 cm.
3) Find the height of the rhombus. Let’s write the formula for the area through the side of the rhombus and the height:
S = ah,
where a is the side of the rhombus, h is the height.
Let us express the height from this formula:
h = S: a.
We found the area and side of the rhombus, which means:
h = 24: 5 = 4.8 cm.
Answer: The height of the rhombus is 4.8 cm.