If the angles of triangle ABC are in the ratio 2:3:4, what is the measure of the largest angle?
Practice Questions
1 question
Q1
If the angles of triangle ABC are in the ratio 2:3:4, what is the measure of the largest angle?
60 degrees
80 degrees
90 degrees
120 degrees
Let the angles be 2x, 3x, and 4x. Then, 2x + 3x + 4x = 180 degrees. Thus, 9x = 180 degrees, x = 20 degrees. The largest angle is 4x = 80 degrees.
Questions & Step-by-step Solutions
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Q
Q: If the angles of triangle ABC are in the ratio 2:3:4, what is the measure of the largest angle?
Solution: Let the angles be 2x, 3x, and 4x. Then, 2x + 3x + 4x = 180 degrees. Thus, 9x = 180 degrees, x = 20 degrees. The largest angle is 4x = 80 degrees.
Steps: 7
Step 1: Understand that the angles of triangle ABC are in the ratio 2:3:4.
Step 2: Assign a variable 'x' to represent a common factor for the angles. So, the angles can be expressed as 2x, 3x, and 4x.
Step 3: Write an equation for the sum of the angles in a triangle. The sum of the angles is 180 degrees, so we have: 2x + 3x + 4x = 180.
Step 4: Combine the terms on the left side of the equation. This gives us: 9x = 180.
Step 5: Solve for 'x' by dividing both sides of the equation by 9. This gives us: x = 20 degrees.
Step 6: Find the largest angle by substituting 'x' back into the expression for the largest angle, which is 4x. So, 4x = 4 * 20 = 80 degrees.
Step 7: Conclude that the measure of the largest angle is 80 degrees.
