Triangulo Isosceles: Teoremas y Problemas

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice del triangulo isosceles.

Zoom

Problem 606: Isosceles Triangles, Perpendicular and Parallel Lines

Geometry Problem
Click the figure below to see the complete problem 606.

Zoom

Geometry Problem 597: Quadrilateral, Right Triangle, Isosceles, Congruence, Angle

Geometry Problem
Click the figure below to see the complete problem 597.

Zoom

Geometry Problem 596: Quadrilateral, Right Triangle, Isosceles, Midpoint

Geometry Problem
Click the figure below to see the complete problem 596.

Zoom

Geometry Problems 571-580

Ten Geometry Problems
Click the figure below to see ten problems about: Circle, Diameter, Chord, Perpendicular, Measurement, Right triangle, Median, Diameter, Excircle, Tangent circles, Cyclic quadrilateral, Angle bisector, Centroid, Isosceles, Midpoint, Concyclic, 90 Degrees, Transversal, Area, Tangency Points.

Read more

Level: High School, College geometry

Problem 577: Isosceles triangle, Midpoint, Perpendicular, Concyclic points, Circle

Geometry Problem
Click the figure below to see the complete problem 577.


Zoom at: Geometry Problem 577

Geometry Problems 461 - 470

Ten Geometry Problems
Click the figure below to see problems 461-470 about: Circle, Tangent, Right Angle, Center, Distance, Isosceles, Transversal, Measurement, 90 Degrees, Arc, Square, Radius, Concentric, Congruence, Chord.

Read more

Level: High School, College geometry

Geometry Problems 431 -440

Ten Geometry Problems
Click the figure below to see problems 431-440 about: Quadrilateral, Trapezoid, Midpoint, Diagonal, Transversal, Parallel, Measurement, Similarity, Proportion, Ratio, Congruence, Tangent, Isosceles.

Read more

Level: High School, College geometry

Geometry Problems 331 - 340

Ten Geometry Problems
Click the figure below to see problems 331-340 about Square, Circle, Similarity, Cyclic quadrilateral, Trapezoid, Triangle, Isosceles, Circumcircle, Incircle, Diagonal, Tangent, Perpendicular, Parallel, Concyclic points.

Read more

Level: High School, SAT Prep, College geometry

Geometry Problems 321 - 330

Ten Geometry Problems
Click the figure below to see problems 321-330 about Triangle, Square, Circle, Area, Cyclic quadrilateral, Collinearity, Concurrence, Incenter, Circumcenter, Excircle, Midpoint, Altitude, Isosceles, Equilateral, Parallel.

Read more

Level: High School, SAT Prep, College geometry

Geometry Problems 281-290

Ten Geometry Problems
Click the figure below to see problems 281-290 about Triangle, Square, Circle, Octagon, Congruence, Isosceles, Equilateral, 90 Degrees, Circular Sector, Semicircle, Tangent, Radius, Diameter, Harmonic Mean.

Read more

Level: High School, SAT Prep, College geometry

Geometry Problems 271-280: Circle, Quadrilateral, Square, Tangent, Cube, Triangle, Isosceles, Area, 90-80-80-20 Degrees, Circumcircle, Sagitta, Inradi

Ten Geometry Problems
Click the figure below to see problems 271-280 about Circles, Tangent, Cube, Triangle, Isosceles, Area, 80-80-20 Degrees, Circumcircle, Sagitta, Inradius, Square, 90, Chord, Quadrilateral, Perpendicular.

Read more

Level: High School, SAT Prep, College geometry

Geometry Problems 251 - 260

Ten Geometry Problems
Click the figure below to see problems 251-260 about Parallelogram, Rectangle, Triangle, Square, Circle, Area, Side, Equilateral, Isosceles, Centroid, Distance, Vertex, Circumcircle, Incircle, Tangent, Diagonal.

Read more

Level: High School, SAT Prep, College geometry

Problem 469: Isosceles triangle, Midpoint, Transversal, Congruence

Geometry Problem
Click the figure below to see the complete problem 469 about Isosceles triangle, Midpoint, Transversal, Congruence.


See also:
Complete Problem 469

Level: High School, SAT Prep, College geometry

Problem 450: Triangle, Median, Cevian, Congruence, Proportional Segments

Geometry Problem
Click the figure below to see the complete problem 450 about Triangle, Median, Cevian, Congruence, Proportional Segments.


See also:
Complete Problem 450
Level: High School, SAT Prep, College geometry

Problem 439: Isosceles triangle, Cevian, Incenter, Angles, Circle

Proposed Problem
Click the figure below to see the complete problem 439 about Isosceles triangle, Cevian, Incenter, Angles, Circle.


See also:
Complete Problem 439

Level: High School, SAT Prep, College geometry

Isosceles Triangle 20-80-80

Theorems and Problems about the isosceles triangle 20-80-80.
Click the figure below to see the index.




Read more at:
Isosceles Triangle 20-80-80

Euclid's Elements Book I, Proposition 6

If in a triangle two angles be equal to one another, the sides which subtend the equal angles will also be equal to one another.
Click the figure bellow to see the illustration.



Read more at:
Euclid's Elements Book I, Proposition 6

Euclid's Elements Book I, Proposition 5: (Pons Asinorum)

In isosceles triangles the angles at the base are equal to one another, and, if the equal straight lines are produced further, then the angles under the base will be equal to one another.
Click the figure bellow to see the illustration.



Read more at:
Euclid's Elements Book I, Proposition 5

Problem 380. Triangle, Excenter, Parallel to a side, Angle, Congruence

Proposed Problem
Click the figure below to see the complete problem 380 about Triangle, Excenter, Parallel to a side, Angle, Congruence.


See more:
Complete Geometry Problem 380
Level: High School, SAT Prep, College geometry