Acute angle triangle, right angle triangle, obtuse angle triangle draw height (main picture)

I hope you can be satisfied!: -)

The three heights of an acute triangle are in the triangle The obtuse triangle has The bar height is outside the triangle, and the right triangle has two heights that are exactly the same___

The three heights of acute triangle are in the triangle, the obtuse triangle has two heights outside the triangle, and the right triangle has two heights, which are right angle sides

How to judge whether a triangle is an acute angle, an obtuse angle, or a right angle triangle Enter three sides, use C The cosine theorem doesn't say that a ^ 2 > b ^ 2 + C ^ 2 is a vertex triangle? The cosine theorem doesn't say that B ^ 2 + C ^ 2-A ^ 2 > 0 is a triangle?

Use cosine theorem, but the efficiency may not be very high, but the program is still easy to write;
1. Sort the three edges first to judge whether they can form a triangle or not, and to find the largest angle (big side to large angle);
2. Cosine theorem cosa = (b * B + C * C-A * a) / 2 * b * C is used;
#include
#include
#define pai 3.1415926
int main()
{
int a,b,c;
double theta,temp;
Printf ("input three non negative integer edges from small to large: A, B, C, n");
scanf("%d%d%d",&a,&b,&c);
if(0==a*a+b*b-c*c)
{
Printf ("right triangle \ \ n");
return 0;
}
temp=(double)(a*a+b*b-c*c)/(2*a*b);
theta=acos(temp);
theta=(180*theta)/pai;
if(theta>90&&theta0&&theta

What is the inner position of acute triangle, right triangle and obtuse triangle? A is inside the triangle B only the heart of the acute triangle is inside the triangle C the heart of a right triangle is on the writing edge None of the above is true 2. In the known triangle ABC, the angle c is 90 degrees, ab = 5cm, AC = 3cm. If C is taken as the center of the circle as a circle tangent to the straight line AB, then the radius of the circle is? 3. In the triangle ABC, the angle c = 90, AC = 3cm, BC = 4cm. When C is the center of the circle and R radius is the circle, there are two intersections with the segment AB, then the range of radius is? You can answer all 30 rewards

A is inside the triangle
The heart is the intersection of the bisectors of the three angles

What are two identical acute triangles, right triangles, obtuse triangles As the title! Good in 30 points!

Two acute triangles that can completely coincide are two identical acute triangles
Two right triangles that can completely coincide are two identical right triangles
Two obtuse angle triangles that can completely coincide are two identical obtuse angle triangles

Every triangle has at least two acute angles, and the other one is one of the acute angles, right angles and obtuse angles

Yes, if the sum of two acute angles is less than 90 degrees, excluding 90 degrees, the other is an obtuse angle,
If the sum of two acute angles greater than 90 ° does not include 90 ° and the other acute angle is acute angle,
If the sum of two acute angles equals 90 ° and the other is a right angle,

A triangle with a minimum angle of 59 degrees must be a triangle () 1. Acute angle 2. Right angle 3. Obtuse angle

Ah! If there is an angle greater than or equal to 90 degrees, then the other angle is less than or equal to 31 degrees, and the minimum angle is not 59 degrees

In a triangle, the largest angle is 85 degrees, so this triangle must be an acute angle B a right angle c obtuse angle

In a triangle, the largest angle is 85 degrees, so this triangle must be "a sharp angle" is a triangle

How many right angles are there in a triangle? How many obtuse angles are there at most? How many acute angles are there at least?

One right angle at most, one obtuse angle at most, and two acute angles at least
As long as you know what a right angle is, what an obtuse angle is, and what is an acute angle,
Even if it is not on the first grade of primary school, it should be able to do it

The location of the outer center of obtuse triangle and acute triangle is proved Try to prove that the outer center of the acute triangle is inside the triangle, and the outer center of the obtuse triangle is outside the triangle How to prove where the intersection of their vertical bisectors is?

Well, in this way, because it's more difficult to type mathematical symbols, I'll briefly describe the steps, please brother Haihan
Since the outer center of a triangle is the center of its circumscribed circle, there must be a circle passing through three points that are not on the same straight line
Then use the knowledge of circle angle to prove
Because obtuse angle is bigger than right angle and acute angle is smaller than right angle, it can be considered to make the circumference angle of right angle circle, i.e. diameter circle angle

Acute angle triangle, right angle triangle, obtuse angle triangle draw height (main picture)