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 >>>.
Keyboard input
Common operation
Trigonometric function and inverse trigonometric function
Four arithmetic operation
$\begin{array}{l}\mathrm{1+2*(5*6-2)+8*9}\\ \mathrm{>>>1+2*(30-2)+8*9}\\ \mathrm{>>>1+2*(28)+8*9}\\ \mathrm{>>>1+56+72}\\ \mathrm{>>>57+72}\\ \mathrm{>>>129}\end{array}$
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