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The degree of the base angle of an isosceles triangle is 1 of the top angle 2. What is the top angle of this triangle?
Let the degree of the base angle of the triangle be X,
Then x + X + 2x = 180
4x=180
x=45
45×2=90
A: the top angle of this triangle is 90 degrees
The degree of the vertex angle of an isosceles triangle is a quarter of the base angle. What is the vertex angle of this triangle?
If the degree of the top angle is a, then the degree of the bottom angle is 4a. According to the theorem of the sum of the interior angles of the triangle, there is 4A + 4A + a = 180 ° to solve the equation, and a = 20 ° is obtained
For an isosceles triangle, the degree ratio of a top angle to a base angle is 7:1. How many degrees are the base angle and the top angle of this isosceles triangle?
Vertex angle: 180 °× 7 / (7 + 1 + 1) = 140 °
Base angle: 180 °× 1 / (7 + 1 + 1) = 20 °
The degree ratio of a top angle to a base angle of an isosceles triangle is 2:1. Its top angle is () degree and its base angle is（ The degree ratio of a top angle to a base angle of an isosceles triangle is 2:1. Its top angle is () degree and its base angle is () degree. Why?
So x + 2x + x = 180 degrees, x = 45 degrees, 2x = 90 degrees
For an isosceles triangle, the ratio of top angle to base angle is 7 to 4. How many degrees are its top angle and base angle?
Its top angle is 180 * 7 / (7 + 4 + 4) = 84 degrees, and its base angle is (180-84) / 2 = 48 degrees
For an isosceles triangle, the degree of the base angle is 1 / 7 of the top angle. How many degrees is the top angle?
You can use the equation,
We can also think of it as follows: if the top angle is 7 parts, then each base angle is 1 part, and the sum of internal angles of triangle is 9 parts. Because the sum of internal angles is 180 degrees, each part is 20 degrees, so the top angle is 20 * 7 = 140 degrees
What is the ratio of the vertex angle and the base angle of the triangle with the ratio of three to four?
180°×4
4+3+3=72°，
180°×3
4+3+3=54°；
A: the top angle of this isosceles triangle is 72 degrees and the base angle is 54 degrees
One of the base degrees of an isosceles triangle is one of the top angles 4. The top angle is______ Degrees, base angles______ Degree
Let the base angle of the isosceles triangle be x, then the top angle is 4x,
x+x+4x=180
6x=180
x=30
4x=120
A: the top angle of this isosceles triangle is 120 ° and the bottom angle is 30 °
So the answer is: 120; 30
The degree of the base angle of an isosceles triangle is three fifths of the degree of the top angle. What is the top angle of the triangle
180 △ (1 + 3 / 5 + 3 / 5) = 81 and 9 / 11 (degrees)
In an isosceles triangle, the vertex degree is equal to 1 / 2 of a base angle. The vertex angle of this triangle is () degree. This is an angle () triangle
In an isosceles triangle, the vertex angle is equal to 1 / 2 of a base angle. The vertex angle of this triangle is (36). This is a (sharp) angle triangle
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