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9th Geometry

Authored by dhakshina moorthy

Mathematics

9th Grade

CCSS covered

Used 714+ times

9th Geometry
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This quiz covers plane geometry concepts appropriate for 9th grade students, focusing on the properties of triangles, quadrilaterals, and circles. The questions assess students' understanding of fundamental geometric relationships including the exterior angle theorem for triangles, properties of special quadrilaterals (squares, rhombuses, parallelograms, and cyclic quadrilaterals), congruent triangles, angle bisector relationships, and circle theorems involving chords, central angles, and inscribed angles. Students need to demonstrate their knowledge of angle relationships in various geometric figures, apply the properties of specific quadrilaterals to solve for unknown angles and classify shapes, recognize congruence patterns, and use circle theorems to calculate chord lengths and angle measures. The mathematical reasoning required includes algebraic manipulation to solve for variables representing angle measures, understanding the relationship between central and inscribed angles, and applying the Pythagorean theorem in circle geometry problems. Created by Dhakshina Moorthy, a Mathematics teacher in India who teaches grade 9. This quiz serves as an excellent tool for assessing students' mastery of essential geometry concepts that form the foundation for more advanced geometric reasoning. Teachers can use this assessment as a comprehensive review before a unit test, as homework to reinforce classroom learning, or as a formative assessment to identify areas where students need additional support. The variety of question types allows for differentiated instruction, with some questions testing basic recall of geometric properties while others require multi-step problem-solving skills. This quiz aligns with Common Core standards G.CO.10 (proving theorems about triangles), G.CO.11 (proving theorems about parallelograms), G.C.2 (identifying relationships between central and inscribed angles), and G.C.4 (constructing tangent lines and finding chord lengths), making it suitable for standards-based instruction and assessment in high school geometry courses.

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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The exterior angle of a triangle is equal to the sum of two______

Exterior angles

Interior opposite angles

Alternate angles

Interior angles

Tags

CCSS.8.G.A.5

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

In the quadrilateral ABCD, AB=BC and AD=DC. Measure of

 BCD\angle BCD  is

150`

30`

105`

72`

Tags

CCSS.HSG.CO.C.11

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

ABCD is a square,diogonals AC and BD meet at O.The number of pairs of congruent triangles with vertex O are

6

8

4

12

Tags

CCSS.HSG.CO.C.11

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

In the given figure

 CEDBCE\parallel DB  then the value of x` is

45`

30`

75`

85`

Tags

CCSS.8.G.A.5

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the diagonal of a rhombus are equal ,then the rhombus is a

parallelogram but not a rectangle

Rectangle but not a square

Square

parallelogram but not a square

Tags

CCSS.HSG.CO.C.11

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If bisectors of

 A and B\angle A\ and\ \angle B  of a quadrilateral ABCD meet at O, then  AOB\angle AOB  is

 C+D\angle C+\angle D  

 12(C+D)\frac{1}{2}\left(\angle C+\angle D\right)  

 12C+13D\frac{1}{2}\angle C+\frac{1}{3}\angle D  

 13C+12D\frac{1}{3}\angle C+\frac{1}{2}\angle D  

Tags

CCSS.HSG.CO.C.9

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The interior angle made by the side in a parallelogram is a

rhombus

rectangle

trapezium

kite

Tags

CCSS.HSG.CO.C.11

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