# Typography of Geometry Problem 1038: Isosceles Triangle, Angle, 80, 20, 25, 65 Degrees, iPad Apps

### Proposition

The figure below depicts an isosceles triangle ABC, where AB = BC, angle B measures 20 degrees, point D lies on BC, and point E lies on AB. Given that angle CAD measures 25 degrees and angle ACE measures 65 degrees, determine the measure of angle CED. Please note that an 'elegant' solution should employ elementary geometry principles without resorting to trigonometry.

**Problem 1038**

Geometry's canvas,

Isosceles triangle formed,

AB equals BC.

Angles set, puzzle awaits,

CED's measure unraveled.

### Geometric Art using iPad or Mobile Apps

Geometric art is a form of art based on the use and application of geometric figures. A geometric figure is any set or combination of points, lines, surfaces and solids.

A mobile app or mobile application software is a computer program designed to run on smartphones and tablet computers.

See also:

Original problem
1038.

## Discover Even More: See Also...

### Problem 1542

### Problem 1541

### Problem 1540

### Problem 1539

### Problem 1538

###

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