help me pls geometry
posted by alexis .
Which tirangles must be similar
1. Two right triangles with a congruent acute angle
2. Two obtuse angles
3 Two isosceles triangles with congruent bases
4. Two scalene triangles with a congruent angle

#1. If the acute angle is equal, then all the angles are equal.

After drawing four squares, Chen completed this chart showing the length of the sides of each square and the area of each square. According to Chenâ€™s chart, if A is the area and s is the length of a side, what can you conclude is the formula for the area of a square?
Side Length Area
1 1
2 4
3 9
4 16 
A=s^2
Respond to this Question
Similar Questions

Geometry
I need help on these two. Consider tirangles ABC and DEF. Side A is congruent to side F. Angle A is congruent to angle F. Angle B is congruent to angle E. What postulate or theorem can be used to prove that the two triangles are congruent? 
Math
If two angles of one triangle are congruent to two angles of another triangle, these triangles must be a) scalene b) similar c) congruent d) isosceles Dont all traiangles have 180 degrees? 
Math Question
Which one of the following pairs of triangle must be similar? 
geometry
can one tell if two triangles are congruent if they are given only the angles and all of them are congruent to one another? 
Geometry
Which is the hypotenuseangle theorem? ________________________________________ A. If the hypotenuse and an acute angle of a right triangle are congruent to the corresponding parts of another right triangle, then the triangles are 
Geometric Proofs
Given: line AB is congruent to line AC, Angle BAD is congruent to angle CAD. Prove: line AD bisects BC Picture: An upside down triangle divided inhalf to form two triangles Angle BAD and angle CAD. They share a common side of AD. and … 
Geometry
Determine whether each statement is always sometimes or never true. If the answer is sometimes or never draw a counterexample. Two congruent triangels are similar : Two squares are similar : Two isosceles triangles are similar : Two … 
Math
The figure below shows two triangles. Which statement about the triangles is true? 
Math
Triangle ABC has coordinates A(4,2), B(0,2), and C(4,1). Triangle DEF has coordinates D(3,6), E(3,2), and F(0,2). Use coordinate geometry to determine if these two triangles are congruent. If they are not congruent, state the reason. … 
Math
Use the congruent triangles shown to answer question 6 and 7. 6. A. B. C. D. 7. Side BC is congruent to which side?