1. Recall of various lines and shapes Descript ion. Reflect and Review (Refer tables 1, 2, 3 below) Table 1. Recall various lines and shapes

Size: px

Start display at page:

Download "1. Recall of various lines and shapes Descript ion. Reflect and Review (Refer tables 1, 2, 3 below) Table 1. Recall various lines and shapes"

Blake Neal
5 years ago
Views:

1. Recall of variou line and hape Decript ion Recall variou

Teaer Anwer 1) Slant ray 2) Rectangle 3) Triangle 4) Oval 5)

Horizontal line Vertical line Slant line Line Segment Ray

1 1. Recall of variou line and hape Decript ion Recall variou line and hape Reflect and Review (Refer table 1, 2, 3 below) Teaer Anwer 1) Slant ray 2) Rectangle 3) Triangle 4) Oval 5) Cylinder 6) Cuboid 7) Vertical line, Table 1 Type of Line Horizontal line Vertical line Slant line Line Segment Ray (bounded by two ditinct end point) (bounded by one ditinct end point) 1

2 Table 2 Type of lane Figure Characteritic() Triangle Three-ided. Rectangle Square Circle Four-ided. Oppoite ide are equal. Four-ided. All ide are equal. Note: A quare i a type of rectangle. A round haped figure. Oval A quahed circle, e.g., an egg. Table 3 Type of Solid Figure Cube Cuboid Cone Cylinder Characteritic() All edge are equal. All face are quare, with equal edge, joined at right angle to each other. E.g. a dice. Oppoite edge for any face are equal. Three oppoite pair of rectangular face, joined at right angle to each other. E.g. a box. It ha a circular urface on one end and one point at the other end where all ide or line meet. Face = 2 (1 flat, 1 d); Vertice = 0; Edge = 0. E.g. a funnel, an ice-cream cone. It ha two circular hape at both end and two parallel line connecting the circular end. Face = 3 (2 flat, 1 d); Vertice = 0; Edge = 0. E.g. a tin can. 2

3 Sphere A round olid figure, with every point on it urface equiditant from it centre. Face = 0 but 1 d urface; Vertice = 0; Edge = 0. E.g. a ball, a globe. 2. Meauring and Drawing a Line Segment Meauring Drawing 3. Curve To meaure a line egment, keep the 0 mark of a ruler at one end of the line egment and read the marking on the ruler where the line egment end. To draw a line egment of length 5 cm, place the ruler on your notebook and mark a point X at the 0 mark and another point Y at the 5 mark of the cale. Join the point along the edge of the ruler to obtain the line egment. Draw a line egment meauring 5 cm 2 mm uing a ruler. 2) a) Open b) Cloed c) Cloed d) Open A line that i not traight i a. Cloed : If a begin and end at the ame point, it i known a a cloed. If a cloed doe not cro itelf, it i a imple cloed. Example of Cloed Curve Claify the below a open or cloed : a) Open b) Cloed c) Cloed d) Open Open : If a doe not end at the tarting 3

4 point, it i known a an open. Example of Open Curve 4. olygon Decrip tion A cloed plane hape made up of three or more line egment i called a polygon. Reflect and Review Teaer Anwer Number Figure Name of the of Side Figure 3 Triangle 4 uadrilateral 5 entagon 6 Hexagon 7 Heptagon Draw a polygon of 7 ide. 8 Octagon 9 Nonagon 10 Decagon 5. Circle A circle i a imple cloed in which all the point on the are at the ame ditance from a fixed point called the centre (O). The ditance between the centre and any point on the circle i called the radiu. If any two point on a circle are joined with a O R S 1) Find the radiu of the circle whoe diameter i 14cm. 2) The radiu of a cooter wheel i 15cm. Find it diameter. 1) 7cm 2) 30cm 4

5 line, it i called a chord. A chord of a circle which pae through the centre i called it diameter. Diameter = 2 Radiu, or, Radiu = Diameter A diameter i the longet chord of a circle. A circle can have many chord, radii and diameter. Circumference i the length of the boundary of a circle. 6. Drawing Circle From the figure, O, O, OR are all radii of the circle with centre O. i the diameter, where = 2 O = 2 O = 2 OR S i a chord joining any two point and S on the circumference of the circle. A circle can be drawn with the help of compae. To draw a circle with radiu 7 cm 1) Draw a circle of radiu 5cm. Step 1: Keep the metal pointed end of the compae firmly on paper. Step 2: Stretch the other arm with pencil and rotate the pencil arm. You can draw circle with defined meaure. The circle will have radiu 7 cm and Diameter = 2 radiu = 2 7 cm = 14 cm 5

6 7. Three Dimenional Shape Three-dimenional hape or olid hape are the object having three meaurement, i.e., length, breadth and height. (See Table Below) 1) Draw the hape of the following a) Dice b) Birthday cap 1) a) Cube b) Cone A face i an individual urface of a olid hape. An edge i a line egment where two or more face meet. A vertex i a point where the edge meet. Table Type of Solid Figure Characteritic() Cube E.g. a dice. Cuboid E.g. a box. Cone Face = 2 (1 flat, 1 d); Vertice = 0; Edge = 0. E.g. a funnel, an ice-cream cone. Cylinder Face = 3 (2 flat, 1 d); Vertice = 0; Edge = 0. E.g. a tin can. Sphere Face = 0 but 1 d urface; Vertice = 0; Edge = 0. E.g. a ball, a globe. 6

7 8. Net of a Three-Dimenional Shape Decription Reflect and Review Teaer An wer A net of a threedimenional hape can be obtained by unfolding the hape. 1. Draw the net of a hape of road roller. 9. Different View of Three-Dimenional Shape A threedimenional hape may look different when viewed from different poition. Front view: Appearance of the object from the front. Side view: Appearance of the object from the ide. Top view: Appearance of the object from the top. 7

Performance Task: In the image below, there are three points (J, K, and I) located on different edges of a cube.

Cube Cross Sections Performance Task: In the image below, there are three points (J, K, and I) located on different edges of a cube. points I, K, and J. This plane would create a cross section through