﻿ Mathfuns
1. Calculator

Taking 1+2 as an example, first input 1+2, then click Compute button , you will get the calculated results 3 in the next line with calculated result identifier >>>. 2. Photo calculator
3. Step-by-step guidance
• Four arithmetic operation

$\begin{array}{l}\mathrm{1+2*\left(5*6-2\right)+8*9}\\ \mathrm{>>>1+2*\left(30-2\right)+8*9}\\ \mathrm{>>>1+2*\left(28\right)+8*9}\\ \mathrm{>>>1+56+72}\\ \mathrm{>>>57+72}\\ \mathrm{>>>129}\end{array}$ • Select or move the geometry Drag coordinate system Delete the selected geometry Clear

• Point Select two points to create midpoint Separation of attachment point from parent object

• Create segment with two points Fixed length line:select a point and enter the length of the segment Create line with two points Create ray with two points Create vector with two points Polyline:select all the vertices in turn, then click the first point

• Perpendicular line:select a point and a straight line to be vertical Perpendicular bisector line:select two points or a line segment Parallel line:select a point and a line to parallel Equal vector:select a point and a vector to parallel Angle bisector:select three points or two straight lines Tangent line:select a point and a circle Polar line:select a point and a circle

• Polygon:select all the vertices in turn, then click the first point Regular polygon:select two points and enter vertex number

• Circle:select center point of the circle and a point in circlein turn Circle:select not three points on the same line Compasses:select a point to determine the center of the circle and a segment to determine the radius of the circle Semicircle arc:select two points,draw from the starting point to the end of the counter clockwise Circular arc:select the center,the starting point,the end point in turn,draw from the starting point to the end of the counter clockwise Circular arc:select not three points on the same line Circular sector:select the center,the starting point,the end point in turn Circular sector:select not three points on the same line

• Measure Coordinate Equation Length Distance Angle Slope Perimeter Area Radius Arc Length