To find the area of a trapezoid ( A ), follow these steps: Find the length of each base ( a and b ). Find the trapezoid’s height ( h ). Substitute these values into the trapezoid area formula: A = (a + b) × h / 2 .

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## What is the formula for finding the area of a trapezoid?

To find the area of a trapezoid ( A ), follow these steps: Find the length of each base ( a and b ). Find the trapezoid’s height ( h ). Substitute these values into the trapezoid area formula: A = (a + b) × h / 2 .

### How do you find the missing side length of a trapezoid?

How do I find the missing side of a trapezoid?

- Identify which side is missing.
- Add together all the other sides and write down the result.
- Subtract that number from the perimeter. The result is the missing side’s length.

**Why is the area of a trapezoid?**

Dissecting the trapezoid The two parallel sides are the bases, and height, as always, is the perpendicular distance from one base to the opposite. The area of this parallelogram is its height (half-height of the trapezoid) times its base (sum of the bases of the trapezoid), so its area is half-height × (base1 + base2).

**How do you call CD of trapezoid ABCD?**

Isosceles Trapezoids A trapezoid ABCD with parallel sides AB and CD is called an isosceles trapezoid if it is a strict trapezoid with BC = DA.

## How do you find the missing side?

How to find the sides of a right triangle

- if leg a is the missing side, then transform the equation to the form when a is on one side, and take a square root: a = √(c² – b²)
- if leg b is unknown, then. b = √(c² – a²)
- for hypotenuse c missing, the formula is. c = √(a² + b²)

### How do you find the sides of a right trapezoid?

If the bases a and b , and the slant side d are known, use the Pythagorean theorem: h = √(d² – (a – b)²) . When knowing the slant side d and the acute angle δ use: h = arcsin(δ) x d .

**Can a trapezoid have 4 different angles?**

A trapezoid CANNOT have four obtuse interior angles. To see why this is, we just need to show that at least one of the interior angles of a trapezoid…

**What are the bases of trapezoid ABCD?**

In trapezoid ABCD, ¯BC ¯AD. The parallel sides ¯BC and ¯AD are called the bases, and the nonparallel sides ¯AB and ¯CD are legs. Base angles are a pair of angles that share a common base.

## How do you prove ABCD is a trapezium?

Summary: The diagonals of a quadrilateral ABCD intersect each other at the point such that AO/BO = CO/DO. Hence it is proved that ABCD is a trapezium.

### What is the missing side length?

The Pythagorean theorem states that a2 + b2 = c2 in a right triangle where c is the longest side. You can use this equation to figure out the length of one side if you have the lengths of the other two.

**How do you work out missing lengths?**

To calculate a missing length, draw the two triangles separately and label the lengths. To calculate the scale factor, divide the two corresponding lengths.