Topics
9. Properties of Lines & Triangles
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United States of AmericaTennessee
Integrated Math 1

9.05 Isosceles and equilateral triangles

Lesson
Practice
Adaptive
Worksheet

Interactive practice questions

$\triangle ABC$△ABC is isosceles, with $\overline{AC}\cong\overline{AB}$AC≅AB.

An isosceles triangle with the top vertex labeled $A$A at $\angle CAB$∠CAB. There are two base vertices which are labeled $C$C (on the left) and $B$B (on the right). The $\angle CAB$∠CAB at vertex $A$A is labeled as degrees(38).Base $\angle ABC$∠ABC at vertex $B$B is labeled as $\left(x\right)$(x) and base $\angle BCA$∠BCA at vertex $C$C is unlabeled.

 

 

 

 

Solve for $x$x.

Easy
1min

Consider the diagram below.

Easy
< 1min

Consider the diagram below.

Easy
< 1min

Consider the diagram below.

Easy
< 1min
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Outcomes

M1.G.CO.B.4

Use definitions and theorems about triangles to solve problems and to justify relationships in geometric figures.

M1.MP1

Make sense of problems and persevere in solving them.

M1.MP2

Reason abstractly and quantitatively.

M1.MP3

Construct viable arguments and critique the reasoning of others.

M1.MP4

Model with mathematics.

M1.MP6

Attend to precision.

M1.MP7

Look for and make use of structure.

M1.MP8

Look for and express regularity in repeated reasoning.

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