1.1. Knowledge to remember
a. Rectangle – Quadrilateral
b. Line segment, line and three collinear points
1.2. Math forms
Type 1: Determine the name of the given shape or find the shape.
The problem often asks to find quadrilaterals, rectangles, line segments, lines in the given shapes.
OLDsolution: Recall the image of the desired shape and select the shapes with similar shapes.
Form 2: Counting pictures
From a given figure requires finding the number of shapes.
– Counting single shapes
– Match single shapes into satisfying larger shapes and continue counting to the end.
Form 3: Draw or draw more shapes to get a shape that satisfies the condition of the problem.
The problem requires drawing one or more lines to a given figure so that the figure has an arbitrary number of triangles and quadrilaterals.
– Using a straightedge, draw more lines and count the shapes.
– Choose the drawing method that meets the requirements of the problem.
1.3. Solving Textbook Exercises
What is each picture below?
Identify the names of the given shapes.
a) Triangle b) Quadrilateral c) Quadrilateral.
d) Square c) Rectangle g) Square.
a) Draw a line segment of length 8cm.
b) Draw a line segment of length 1dm.
– Use a pencil and ruler.
– Mark a point, place the ruler so that it coincides with the 0cm line; Mark the remaining point coincident with the line of the length to be drawn.
– Keeping the ruler in place, use a pencil to connect the two points you just marked along the edge of the ruler.
– Name 2 points of each line segment. From there, I got the line to draw.
a) Use a ruler with centimeter divisions, a point at the 0 line and mark the point at the 8 line, and then connect the two points.
b) Use a ruler with centimeter divisions, a point on the 0 line and mark a point on the 10 mark, and then connect the two points.
Name three collinear points (use a ruler to check)
– Applying knowledge: If three points lie on the same line, then the three points are collinear.
– Put the ruler on three points in the given points, if they are on the same edge of the ruler, it is 3 points in line.
Three points A, B, E are collinear.
Three points D, E, C collinear
The three points D, B, I are in line.