How to find the height of a triangle - SAT Math
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A triangle has a base of 5 cm and an area of 15 cm. What is the height of the triangle?
A triangle has a base of 5 cm and an area of 15 cm. What is the height of the triangle?
The area of a triangle is (1/2)*base*height. We know that the area = 15 cm, and the base is 5 cm, so:
15 = 1/2 * 5 * height
3 = 1/2 * height
6 = height
The area of a triangle is (1/2)*base*height. We know that the area = 15 cm, and the base is 5 cm, so:
15 = 1/2 * 5 * height
3 = 1/2 * height
6 = height
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In the figure above, AB = AD = AE = BD = BC = CD = DE = 1. What is the distance from A to C?
In the figure above, AB = AD = AE = BD = BC = CD = DE = 1. What is the distance from A to C?
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A triangles has sides of 5, 9, and 
. Which of the folowing CANNOT be a possible value of 
?
A triangles has sides of 5, 9, and
The sum of the lengths of the shortest sides of a triangle cannot be less than the third side.
3 + 5 = 8 < 9, so 3 can't be a value of x.
The sum of the lengths of the shortest sides of a triangle cannot be less than the third side.
3 + 5 = 8 < 9, so 3 can't be a value of x.
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An equilateral triangle has a side length of 4. What is the height of the triangle?
An equilateral triangle has a side length of 4. What is the height of the triangle?
Because the triangle is an equilateral triangle, you know that all sides have the same length, so all sides have the length of 4. Draw the triangle and label all sides as 4. Next, draw a point in the middle of one of the sides, and label each side as 2. Draw a line segment from the midpoint that you just created to the opposite angle of the triangle. That line segment is the height of the triangle. You can solve for it by using the Pythagorean theorem.
The Pythagorean theorem states that
In our scenario a = 2, c = 4, and you are solving for b. After plugging the numbers into the formula you get
and then 
and then 
and then 
Therefore, the height of the triangle is 
Because the triangle is an equilateral triangle, you know that all sides have the same length, so all sides have the length of 4. Draw the triangle and label all sides as 4. Next, draw a point in the middle of one of the sides, and label each side as 2. Draw a line segment from the midpoint that you just created to the opposite angle of the triangle. That line segment is the height of the triangle. You can solve for it by using the Pythagorean theorem.
The Pythagorean theorem states that
In our scenario a = 2, c = 4, and you are solving for b. After plugging the numbers into the formula you get
and then
and then
and then
Therefore, the height of the triangle is
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