Three angles of a quadrilateral measure `110^(@), 82^(@) and 68^(@)`. Find the measure of the fourth angle.
A
`80^(@).`
B
`100^(@).`
C
`200^(@).`
D
`70^(@).`
Text Solution
AI Generated Solution
The correct Answer is:
To find the measure of the fourth angle in a quadrilateral when three angles are given, we can follow these steps:
### Step-by-Step Solution:
1. **Understand the property of quadrilaterals**: The sum of all four angles in a quadrilateral is always 360 degrees.
2. **Identify the given angles**: The three angles provided are:
- Angle A = 110 degrees
- Angle B = 82 degrees
- Angle C = 68 degrees
3. **Set up the equation**: Let the fourth angle be represented as \( x \). According to the property of quadrilaterals, we can write the equation:
\[
\text{Angle A} + \text{Angle B} + \text{Angle C} + \text{Angle D} = 360
\]
This translates to:
\[
110 + 82 + 68 + x = 360
\]
4. **Calculate the sum of the known angles**:
\[
110 + 82 = 192
\]
\[
192 + 68 = 260
\]
5. **Substitute the sum into the equation**: Now, we can substitute the sum of the angles into the equation:
\[
260 + x = 360
\]
6. **Solve for \( x \)**: To find \( x \), subtract 260 from both sides:
\[
x = 360 - 260
\]
\[
x = 100
\]
7. **Conclusion**: The measure of the fourth angle is \( 100 \) degrees.
### Final Answer:
The measure of the fourth angle is \( 100^\circ \).
To find the measure of the fourth angle in a quadrilateral when three angles are given, we can follow these steps:
### Step-by-Step Solution:
1. **Understand the property of quadrilaterals**: The sum of all four angles in a quadrilateral is always 360 degrees.
2. **Identify the given angles**: The three angles provided are:
- Angle A = 110 degrees
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