The exam will cover all the materials we have learned in the Fall 2021-2022 term, namely chapters 3. 4. 5 & 8. See course info here.

The exam will be posted Saturday night in Google Classroom. Please print out all the pages before class.

zhenli Posted in Teaching Plan，

23
January
2022

Comments Off on Math 7A, Lesson 16, Final Exam Fall 2021-2022, 1/23/2022

The exam will cover all the materials we have learned in the Fall 2021-2022 term, namely chapters 3. 4. 5 & 8. See course info here.

The exam will be posted Saturday night in Google Classroom. Please print out all the pages before class.

zhenli Posted in Teaching Plan，

15
January
2022

Comments Off on Math 7, Lesson 15, Fall 2021-2022, 1/16/2022

- Use of compass: center, radius, pin leg, and drawing leg
- To draw a circle
- To mark off or copy a line segment
- How to draw a
**perpendicular bisector of a line segment**? - Any point on the perpendicular bisector of a line segment is equidistant from the two end points of the segment.

- A ray AZ divides <BAC into two equal angles, <BAZ and <CAZ. The ray is called
**the angle bisector**of <ABC - How to draw an angle bisector?
- Any point on the angle bisector of an angle is equidistant from the two sides of the angle.

- Construct/draw circles, triangles, angles, equal line segments
- construct /draw perpendicular bisectors of line segments
- construct/draw angle bisectors of angles

- The number of equal sides in the triangle:
**scalene triangle**– no equal sides;**isosceles triangle**– two equal sides;**equilateral triangles**– three equal sides - The type of angles of the triangle:
**acute-angled triangle**– all angles are acute;**right-angled triangle**– one of the angles is a right angle;**obtuse-angled triangle**– one of the angles is an obtuse angle - Is an equilateral triangle also an isosceles triangle?
- Is it Possible to draw a triangle with more than one obtuse angle?
- Can a scalene triangle be an acute-angled, right-angled or obtuse-angled triangle?
- All the three angles in a scalene triangle are different size
- The angles opposite the equal sides of an isosceles triangle are equal
- All the three angles in an equilateral triangle are equal in size

- A closed plane figure with four straight sides joined by four vertices is called a quadrilateral
- Vertices, diagonals
- Properties of special quadrilaterals
- Parallelogram: 2 pairs of parallel and equal opposite sides
- Rectangle: all angles are right angles
- Rhombus: all sides are equal, diagonals are perpendicular to each other
- Square: all sides are equal, all angles are right angles
- Trapezoid: 1 pair of parallel sides

**Handout:**- Two pages

**Workbook:**- Page 48-50: 12, 13, 14,15,16

zhenli Posted in Teaching Plan，

08
January
2022

Comments Off on Math 7, Lesson 14, Fall 2021-2022, 1/9/2022

- Point: has position; has no size
- Line: has an infinite number of points; has no width; can be determined by two points; can be straight or curved
- Ray: a part of a line with one endpoint
- Endpoint
- Line segment: a part of a line between two end points; has length
- Plane: a flat surface; has no thickness
- Parallel lines: two lines on the same plane do not intersect (meet or cut)
- Perpendicular (lines) to each other: two lines intersect at right angle
- Foot of the perpendicular

- Acute angle: angle < 90 degree
- Right angle: angle = 90 degree
- Obtuse angle: 90 degree < angle < 180 degree
- Reflex angle: 180 degree < angle < 360 degree

- Complementary angles: the sum of two angles is 90 degree
- Supplementary angles: the sum of two angels is 180 degree
- Adjacent angles: two angles share a common side and a common vertex but do not overlap

- The sum of adjacent angles on a straight line is 180 degree
- The sum of all angles at a point is 360 degree
- Vertically opposite angles: when two lines intersect, the vertically opposite angles are equal

**Handout:**- Two pages

**Workbook:**- Page 45: 1, 2, 3
- Page 46: 4, 5