Isosceles triangle geometry online calculator
发布日期 ： 2019-10-31 02:57:12 UTC
分类 ： Geometric
App Description
Isosceles triangle calculation formula:
<table class="countrytable"> <tbody> <tr> <td width="290"> Area(K) </td> <td width="300"> K<sup>2</sup> = b<sup>2</sup> * (4 × a<sup>2</sup> - b<sup>2</sup>) / 16 </td> </tr>
<tr>
<td width="290">
Perimeter
</td>
<td width="300">
2 × a + b
</td>
</tr>
<tr>
<td width="290">
Side b bisector ( t<sub>b</sub> )
</td>
<td width="300">
t<sub>b</sub><sup>2</sup> = 4 × a<sup>2</sup> - b<sup>2</sup> / 2
</td>
</tr>
<tr>
<td width="290">
Side a bisector( t<sub>b</sub> )
</td>
<td width="300">
t<sub>a</sub><sup>2</sup> = b<sup>2</sup> × a × (2a + b) / (a + b)<sup>2</sup>
</td>
</tr>
<tr>
<td width="290">
Side a median line ( m<sub>a</sub> )
</td>
<td width="300">
m<sub>a</sub><sup>2</sup> = (2 * b<sup>2</sup> + a<sup>2</sup>) / 4
</td>
</tr>
<tr>
<td width="290">
Side b center line ( m<sub>b</sub> )
</td>
<td width="300">
m<sub>b</sub><sup>2</sup> = (4 * a<sup>2</sup> - b<sup>2</sup>) / 4
</td>
</tr>
<tr>
<td width="290">
Circumferential circle radius
</td>
<td width="300">
a / ( 2 * sin (A)) or b / ( 2 * sin (B))
</td>
</tr>
<tr>
<td width="290">
Inscribed circle radius (r)
</td>
<td width="300">
r<sup>2</sup> = b<sup>2</sup> × (2a - b) / (4 × (2a + b))
</td>
</tr>
</tbody>
</table>
Usage example
Input data:
Side length a: 4
Side length b: 4
Click "Calculate" to output data
Corner A: 60
Corner B: 60
Area: 6.928203
Perimeter: 12
External circle radius: 2.309
Inscribed circle radius: 1.154
Height of a side: 3.464
Height of b side: 3.464
a corner bisector: 3.464
b corner bisector: 3.464
a side of the line: 3.464
B side center line: 3.464
Note
The isosceles triangle side length, angle, enter any two values, you can find the relevant parameters such as the circumference and area of the isosceles triangle.