Write down the steps for the first question. Don't write down the second question 1. A base angle of an isosceles triangle is equal to 4 times the vertex angle. Find the degree of each angle of the isosceles triangle 2. The difference between axisymmetric figures and axisymmetric figures is that the former is for () figures, while the latter is for () figures

Write down the steps for the first question. Don't write down the second question 1. A base angle of an isosceles triangle is equal to 4 times the vertex angle. Find the degree of each angle of the isosceles triangle 2. The difference between axisymmetric figures and axisymmetric figures is that the former is for () figures, while the latter is for () figures

The base angle is 80 degrees and the apex angle is 20 degrees
If the top angle is x, the bottom angle is 4x, so 2 * 4x + x = 9x = 180
So x = 20, 4x = 80
The former is for (2) figures, while the latter is for (1) figures

Two primary school math problems, very simple, help me?
The figure composed of two circles must be axisymmetric, right? 、
Application question: how many circles can be cut out at most by cutting a piece of rectangular paper with a length of 16 cm and a width of 12 cm into a circle with a radius of 2 cm? Write the formula, thanks

1. Right. Because there are countless cuboids of 2.16 cm in length and 12 cm in width on the symmetry axis of a circle, how many can be cut out at most? (write a length formula, thanks!) s Rectangle / s circle = length * width / π R ^ 2 = 16 * 12 / 4 π = 192 / 4 π ≈ 15. In fact, if the diameter is 4, 12 / 4 = 316 / 4 = 43

A shareholder bought 1000 shares on Friday, but didn't open on Saturday and Sunday, with 27 yuan per share. Here are the ups and downs
.
Monday, two, three, four, five
Up and down + 4 + 4.5 - 1 - 2.5 - 4
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This person paid 1.5 ‰ of the transaction fee and 1 ‰ of the transaction tax when he bought the stock. If he sold the stock before Friday's closing, how much did he earn?

Buying amount: 27 × 1000 = 27000 yuan handling charge: 27000 × 1.5 ‰ = 40.5 yuan total buying cost: 27000 + 40.5 = 27040.5 yuan unit selling price: 27 + 4 + 4.5-1-2.5-4 = 28 yuan selling amount: 28 × 1000 = 28000 yuan selling handling charge: 28000 × 1.5 ‰ = 42 yuan transaction tax: 28000 × 1 ‰ = 28 yuan total selling amount