Kangaroo and Mathematics

The property of square root and baby kangaroos.

Baby kangaroos bounce as minus sign bounce.

However, where the denominator should be a negative number.

example)

Turtles and Mathematics

Properties of the square root

-Turtle, turtle. Give me the head. Gujiga (a<0, b<0)

To turtle a <0, b <0, given the neck fit drain.

Turtle neck is a symbol of the minus sign here!

Detective Conan is not suffering

The secret lies in a bow tie!

This problem comes to the school exams.

Prince monk and Math

circle and tangent

1. tangent of circle passing through the tangent to the point of tangency radius is in the perpendicularity.

2. Circle one that crosses above. Perpendicularity to the point passes through the radius of the circle is the straight line is tangent.
A lot to say. Please understand the pictures! Knock, Knock, Knock, Knock~

Dinosaurs and mathematics-2

Dinosaur Roar and size of dihedral angle

Dihedral angle? Two plane angle

dihedral angle, try not to think harder! Journalists that the open mouth of dinosaurs.
Two side angle.

Dinosaurs and Mathematics

Fear of orthogonal projection

What is orthographic? Roughly perpendicular to the bottom of any shape, shed light on the floor looking at the shape, or shadow

earthworm's length is length of orthogonal projection, and the shadow of a dinosaur foot is the area of ​​orthogonal projection. orthogonal projection problem, you know why you are afraid of student?
Problem with when it comes to difficult!

point: Side across the tread, but you want to step on the fitted cosine theta.

Skiing and Mathematics

Teaches chord to the nature of ski jumping.

The same distance from the center of a circle (leg length) in the two chord lengths (ski length) with each other same.

Length of a circle with the same two chord (ski length) the same distance from the center of the circle (leg length) is.